| 630-200 | Naperville | Wireless | Verizon |
| 630-201 | Naperville | Wireless | Sprint Spectrum |
| 630-202 | Western Springs | Wireless | Sprint Spectrum |
| 630-203 | Wood Dale | Landline | Mcimetro Access Transmission Services |
| 630-204 | Northbrook | Wireless | Verizon |
| 630-205 | Northbrook | Wireless | Sprint Spectrum |
| 630-206 | West Chicago | Landline | Level 3 Communications |
| 630-207 | Western Springs | Wireless | New Cingular Wireless |
| 630-208 | Geneva | Landline | Illinois Bell Tel |
| 630-209 | Western Springs | Wireless | New Cingular Wireless |
| 630-210 | Naperville | Landline | AT&T |
| 630-212 | Wheeling | Wireless | New Cingular Wireless |
| 630-213 | Hanover Park | Landline | Illinois Bell Tel |
| 630-214 | Oak Brook | Landline | Level 3 Communications |
| 630-215 | Western Springs | Wireless | New Cingular Wireless |
| 630-216 | Big Rock | Landline | Rcn Telecom Services Of Illinios |
| 630-217 | Schaumburg | Wireless | New Cingular Wireless |
| 630-218 | Oak Brook | Landline | Illinois Bell Tel |
| 630-219 | Naperville | Landline | Level 3 Communications |
| 630-220 | Schaumburg | Wireless | New Cingular Wireless |
| 630-221 | Wheaton | Landline | Illinois Bell Tel |
| 630-222 | Chicago | Wireless | Verizon |
| 630-223 | Western Springs | Wireless | USA Mobility Wireless |
| 630-224 | Naperville | Landline | Illinois Bell Tel |
| 630-225 | Warrenville | Landline | Level 3 Communications |
| 630-226 | Lemont | Landline | Illinois Bell Tel |
| 630-227 | Bensenville | Landline | Illinois Bell Tel |
| 630-228 | Itasca | Landline | Level 3 Communications |
| 630-229 | Montgomery | Landline | Comcast Phone Of Illinois |
| 630-230 | Oak Brook | Landline | Illinois Bell Tel |
| 630-231 | West Chicago | Landline | Illinois Bell Tel |
| 630-232 | Geneva | Landline | Illinois Bell Tel |
| 630-233 | Hanover Park | Landline | Ovation Communications Of Illinois |
| 630-234 | Winfield | Wireless | New Cingular Wireless |
| 630-235 | Western Springs | Wireless | New Cingular Wireless |
| 630-236 | Aurora | Landline | Illinois Bell Tel |
| 630-237 | Roselle | Landline | Teleport Communications America |
| 630-238 | Bensenville | Landline | Illinois Bell Tel |
| 630-239 | Mooseheart | Landline | Mcimetro Access Transmission Services |
| 630-240 | Western Springs | Wireless | New Cingular Wireless |
| 630-241 | Woodridge | Landline | Illinois Bell Tel |
| 630-242 | Oak Brook | Landline | Level 3 Communications |
| 630-243 | Lemont | Landline | Illinois Bell Tel |
| 630-244 | Wheeling | Wireless | New Cingular Wireless |
| 630-245 | Naperville | Landline | Illinois Bell Tel |
| 630-246 | Hanover Park | Landline | Level 3 Communications |
| 630-247 | Western Springs | Wireless | New Cingular Wireless |
| 630-248 | Western Springs | Wireless | New Cingular Wireless |
| 630-249 | Western Springs | Wireless | USA Mobility Wireless |
| 630-250 | Itasca | Landline | Illinois Bell Tel |
| 630-251 | Winfield | Wireless | New Cingular Wireless |
| 630-252 | Lemont | Landline | Illinois Bell Tel |
| 630-253 | Wheeling | Wireless | New Cingular Wireless |
| 630-254 | Schaumburg | Wireless | New Cingular Wireless |
| 630-255 | River Forest | Wireless | USA Mobility Wireless |
| 630-256 | Western Springs | Wireless | Illinois Bell Tel |
| 630-257 | Lemont | Landline | Illinois Bell Tel |
| 630-258 | Western Springs | Wireless | New Cingular Wireless |
| 630-259 | Wood Dale | Landline | Mcimetro Access Transmission Services |
| 630-260 | Wheaton | Landline | Illinois Bell Tel |
| 630-261 | Lombard | Landline | Illinois Bell Tel |
| 630-262 | Geneva | Landline | Illinois Bell Tel |
| 630-263 | Northbrook | Wireless | Verizon |
| 630-264 | Aurora | Landline | Illinois Bell Tel |
| 630-265 | Western Springs | Wireless | American Messaging Services |
| 630-266 | Western Springs | Wireless | USA Mobility Wireless |
| 630-267 | Schaumburg | Wireless | New Cingular Wireless |
| 630-268 | Lombard | Landline | Illinois Bell Tel |
| 630-269 | Summit Argo | Wireless | Verizon |
| 630-270 | Montgomery | Wireless | Verizon |
| 630-271 | Woodridge | Landline | Illinois Bell Tel |
| 630-272 | Western Springs | Wireless | New Cingular Wireless |
| 630-273 | Plano | Landline | First Communications |
| 630-274 | Bensenville | Landline | Teleport Communications America |
| 630-275 | Woodridge | Landline | Illinois Bell Tel |
| 630-276 | Naperville | Landline | Mcimetro Access Transmission Services |
| 630-278 | Schaumburg | Wireless | New Cingular Wireless |
| 630-279 | Elmhurst | Landline | Illinois Bell Tel |
| 630-280 | Western Springs | Wireless | New Cingular Wireless |
| 630-281 | Naperville | Landline | Level 3 Communications |
| 630-282 | Wood Dale | Landline | Mcimetro Access Transmission Services |
| 630-283 | Roselle | Landline | Teleport Communications America |
| 630-284 | Schaumburg | Wireless | New Cingular Wireless |
| 630-285 | Itasca | Landline | Illinois Bell Tel |
| 630-286 | Oak Brook | Landline | XO Communications |
| 630-287 | Schaumburg | Wireless | New Cingular Wireless |
| 630-288 | Oak Brook | Landline | Teleport Communications America |
| 630-289 | Hanover Park | Landline | Illinois Bell Tel |
| 630-290 | Lombard | Wireless | T-Mobile |
| 630-291 | Western Springs | Wireless | Verizon |
| 630-292 | Western Springs | Wireless | Verizon |
| 630-293 | West Chicago | Landline | Illinois Bell Tel |
| 630-294 | Chicago | Wireless | Verizon |
| 630-295 | Roselle | Landline | Illinois Bell Tel |
| 630-296 | Willowbrook | Landline | Teleport Communications America |
| 630-297 | Woodridge | Landline | Level 3 Communications |
| 630-298 | Western Springs | Wireless | American Messaging Services |
| 630-299 | Montgomery | Landline | Level 3 Communications |
| 630-300 | Naperville | Landline | Mcimetro Access Transmission Services |
| 630-301 | Montgomery | Landline | Rcn Telecom Services Of Illinios |
| 630-302 | Northbrook | Wireless | Verizon |
| 630-303 | Naperville | Wireless | Verizon |
| 630-304 | Western Springs | Wireless | Indiana Paging Network |
| 630-305 | Naperville | Landline | Illinois Bell Tel |
| 630-306 | Schaumburg | Wireless | New Cingular Wireless |
| 630-307 | Roselle | Landline | Illinois Bell Tel |
| 630-308 | Western Springs | Wireless | Verizon |
| 630-309 | Northbrook | Wireless | Verizon |
| 630-310 | Woodridge | Landline | Rcn Telecom Services Of Illinios |
| 630-312 | Lemont | Landline | Illinois Bell Tel |
| 630-313 | Geneva | Landline | Rcn Telecom Services Of Illinios |
| 630-314 | Roselle | Wireless | Illinois Bell Tel |
| 630-315 | Wood Dale | Landline | Mcimetro Access Transmission Services |
| 630-316 | Western Springs | Wireless | American Messaging Services |
| 630-317 | Wood Dale | Landline | Mcimetro Access Transmission Services |
| 630-318 | Big Rock | Landline | Level 3 Communications |
| 630-319 | Western Springs | Wireless | Verizon |
| 630-320 | Oak Brook | Landline | Teleport Communications America |
| 630-321 | Oak Brook | Landline | Illinois Bell Tel |
| 630-322 | Woodridge | Landline | Illinois Bell Tel |
| 630-323 | Oak Brook | Landline | Illinois Bell Tel |
| 630-324 | Wood Dale | Landline | Mcimetro Access Transmission Services |
| 630-325 | Oak Brook | Landline | Illinois Bell Tel |
| 630-326 | Mooseheart | Landline | Teleport Communications America |
| 630-327 | Western Springs | Wireless | Sprint Spectrum |
| 630-328 | Oak Brook | Landline | Teleport Communications America |
| 630-329 | Schaumburg | Wireless | New Cingular Wireless |
| 630-330 | Elmhurst | Wireless | Sprint Spectrum |
| 630-332 | Plano | Landline | Choice One Comm Il |
| 630-333 | Elmhurst | Landline | Sprint Spectrum |
| 630-334 | Western Springs | Wireless | Verizon |
| 630-335 | Naperville | Landline | Sprint Spectrum |
| 630-336 | Schaumburg | Wireless | New Cingular Wireless |
| 630-337 | Schaumburg | Wireless | New Cingular Wireless |
| 630-338 | Saint Charles | Landline | New Cingular Wireless |
| 630-339 | Roselle | Landline | Level 3 Communications |
| 630-340 | Montgomery | Wireless | T-Mobile |
| 630-341 | Western Springs | Wireless | Verizon |
| 630-342 | Western Springs | Wireless | USA Mobility Wireless |
| 630-343 | Willowbrook | Landline | AT&T |
| 630-344 | Wood Dale | Landline | XO Communications |
| 630-345 | Geneva | Landline | Illinois Bell Tel |
| 630-346 | West Chicago | Landline | New Cingular Wireless |
| 630-347 | Schaumburg | Wireless | New Cingular Wireless |
| 630-348 | Wood Dale | Landline | XO Communications |
| 630-349 | Elmhurst | Landline | Vonage America |
| 630-350 | Bensenville | Landline | Illinois Bell Tel |
| 630-351 | Roselle | Landline | Illinois Bell Tel |
| 630-352 | Schaumburg | Wireless | Verizon |
| 630-353 | Woodridge | Landline | Illinois Bell Tel |
| 630-354 | Bensenville | Landline | Paetec Communications |
| 630-355 | Naperville | Landline | Illinois Bell Tel |
| 630-356 | Western Springs | Wireless | USA Mobility Wireless |
| 630-357 | Naperville | Landline | Illinois Bell Tel |
| 630-358 | Sugar Grove | Landline | Level 3 Communications |
| 630-359 | Elmhurst | Landline | Teleport Communications America |
| 630-360 | Sugar Grove | Wireless | Verizon |
| 630-361 | Itasca | Landline | Sprint Spectrum |
| 630-362 | Naperville | Wireless | T-Mobile |
| 630-363 | Schaumburg | Wireless | New Cingular Wireless |
| 630-364 | Naperville | Landline | Level 3 Communications |
| 630-365 | Elburn | Landline | Illinois Bell Tel |
| 630-366 | Wood Dale | Landline | Mcimetro Access Transmission Services |
| 630-367 | Western Springs | Wireless | USA Mobility Wireless |
| 630-368 | Oak Brook | Landline | Illinois Bell Tel |
| 630-369 | Naperville | Landline | Illinois Bell Tel |
| 630-370 | Northbrook | Wireless | Verizon |
| 630-371 | Wood Dale | Landline | XO Communications |
| 630-372 | Hanover Park | Landline | Illinois Bell Tel |
| 630-373 | Schaumburg | Wireless | New Cingular Wireless |
| 630-374 | Naperville | Wireless | USA Mobility Wireless |
| 630-375 | Aurora | Landline | Illinois Bell Tel |
| 630-376 | Wood Dale | Landline | XO Communications |
| 630-377 | Saint Charles | Landline | Illinois Bell Tel |
| 630-378 | Lemont | Landline | Illinois Bell Tel |
| 630-379 | Wood Dale | Landline | XO Communications |
| 630-380 | Schaumburg | Wireless | New Cingular Wireless |
| 630-381 | Western Springs | Wireless | Illinois Bell Tel |
| 630-382 | Wood Dale | Landline | Mcimetro Access Transmission Services |
| 630-383 | Oswego | Landline | Mcimetro Access Transmission Services |
| 630-384 | Wheaton | Landline | Illinois Bell Tel |
| 630-385 | Yorkville | Landline | Level 3 Communications |
| 630-386 | West Chicago | Wireless | New Cingular Wireless |
| 630-387 | Elburn | Landline | First Communications |
| 630-388 | Naperville | Landline | XO Communications |
| 630-389 | Mooseheart | Landline | Level 3 Communications |
| 630-390 | Wood Dale | Landline | XO Communications |
| 630-391 | Sugar Grove | Landline | Verizon |
| 630-392 | Naperville | Wireless | Sprint Spectrum |
| 630-393 | Warrenville | Landline | Illinois Bell Tel |
| 630-394 | Western Springs | Wireless | Bandwidth.com |
| 630-395 | Wood Dale | Landline | Mcimetro Access Transmission Services |
| 630-396 | Lombard | Landline | Sigecom |
| 630-397 | Geneva | Landline | Ovation Communications Of Illinois |
| 630-398 | Western Springs | Wireless | New Cingular Wireless |
| 630-399 | Western Springs | Wireless | Verizon |
| 630-400 | South Elgin | Wireless | T-Mobile |
| 630-401 | Montgomery | Wireless | T-Mobile |
| 630-402 | Geneva | Landline | Comcast Phone Of Illinois |
| 630-403 | Glen Ellyn | Landline | Paetec Communications |
| 630-404 | Northbrook | Wireless | Verizon |
| 630-405 | Montgomery | Landline | XO Communications |
| 630-406 | Mooseheart | Landline | Illinois Bell Tel |
| 630-407 | Wheaton | Landline | Illinois Bell Tel |
| 630-408 | Western Springs | Wireless | New Cingular Wireless |
| 630-409 | Sugar Grove | Landline | Level 3 Communications |
| 630-410 | Oak Brook | Landline | Teleport Communications America |
| 630-412 | Bensenville | Landline | Teleport Communications America |
| 630-413 | Oak Brook | Landline | Level 3 Communications |
| 630-414 | West Chicago | Wireless | New Cingular Wireless |
| 630-415 | Elmhurst | Landline | Illinois Bell Tel |
| 630-416 | Naperville | Landline | Illinois Bell Tel |
| 630-417 | Western Springs | Wireless | Sprint Spectrum |
| 630-418 | Western Springs | Wireless | New Cingular Wireless |
| 630-419 | Western Springs | Wireless | USA Mobility Wireless |
| 630-420 | Naperville | Landline | Illinois Bell Tel |
| 630-421 | Northbrook | Wireless | Verizon |
| 630-422 | Oak Brook | Landline | Teleport Communications America |
| 630-423 | Montgomery | Landline | Teleport Communications America |
| 630-424 | Lombard | Landline | Illinois Bell Tel |
| 630-425 | Mooseheart | Landline | Teleport Communications America |
| 630-426 | Lombard | Landline | Teleport Communications America |
| 630-427 | Woodridge | Landline | Illinois Bell Tel |
| 630-428 | Naperville | Landline | Illinois Bell Tel |
| 630-429 | Montgomery | Landline | AT&T |
| 630-430 | La Grange | Wireless | Sprint Spectrum |
| 630-431 | Schaumburg | Wireless | New Cingular Wireless |
| 630-432 | Woodridge | Wireless | Verizon |
| 630-433 | Wood Dale | Landline | Mcimetro Access Transmission Services |
| 630-434 | Woodridge | Landline | Illinois Bell Tel |
| 630-435 | Woodridge | Landline | Illinois Bell Tel |
| 630-436 | Schaumburg | Wireless | New Cingular Wireless |
| 630-437 | Woodridge | Landline | Ovation Communications Of Illinois |
| 630-438 | Itasca | Landline | Mcimetro Access Transmission Services |
| 630-439 | Wood Dale | Landline | XO Communications |
| 630-440 | West Chicago | Wireless | T-Mobile |
| 630-441 | Woodridge | Landline | AT&T |
| 630-442 | Woodridge | Landline | AT&T |
| 630-443 | Saint Charles | Landline | Illinois Bell Tel |
| 630-444 | Saint Charles | Landline | Illinois Bell Tel |
| 630-445 | Oak Brook | Landline | AT&T |
| 630-446 | Wood Dale | Landline | Mcimetro Access Transmission Services |
| 630-447 | Warrenville | Landline | Level 3 Communications |
| 630-448 | Elburn | Landline | Level 3 Communications |
| 630-449 | Aurora | Landline | Teleport Communications America |
| 630-450 | Montgomery | Wireless | Verizon |
| 630-451 | Mount Prospect | Landline | Level 3 Communications |
| 630-452 | La Grange | Wireless | Sprint Spectrum |
| 630-453 | Naperville | Wireless | Verizon |
| 630-454 | Mooseheart | Landline | XO Communications |
| 630-455 | Oak Brook | Landline | Illinois Bell Tel |
| 630-456 | Oak Brook | Landline | AT&T |
| 630-457 | Geneva | Landline | Level 3 Communications |
| 630-458 | Elmhurst | Landline | Illinois Bell Tel |
| 630-459 | Northbrook | Wireless | Verizon |
| 630-460 | Western Springs | Wireless | New Cingular Wireless |
| 630-461 | Schaumburg | Wireless | Sprint Spectrum |
| 630-462 | Wheaton | Landline | Illinois Bell Tel |
| 630-463 | Geneva | Landline | Mcimetro Access Transmission Services |
| 630-464 | Schaumburg | Wireless | New Cingular Wireless |
| 630-465 | Sugar Grove | Landline | Bandwidth.com |
| 630-466 | Sugar Grove | Landline | Illinois Bell Tel |
| 630-467 | Itasca | Landline | Illinois Bell Tel |
| 630-468 | Oak Brook | Landline | Rcn Telecom Services Of Illinios |
| 630-469 | Glen Ellyn | Landline | Illinois Bell Tel |
| 630-470 | Naperville | Landline | Verizon |
| 630-471 | Schaumburg | Wireless | New Cingular Wireless |
| 630-472 | Oak Brook | Landline | Illinois Bell Tel |
| 630-473 | West Chicago | Landline | Comcast Phone Of Illinois |
| 630-474 | Glen Ellyn | Landline | Comcast Phone Of Illinois |
| 630-475 | Bensenville | Landline | Mcimetro Access Transmission Services |
| 630-476 | Western Springs | Wireless | Verizon |
| 630-477 | Bensenville | Landline | Mcimetro Access Transmission Services |
| 630-478 | Elmhurst | Landline | AT&T |
| 630-479 | Northbrook | Wireless | Sprint Spectrum |
| 630-480 | Oak Brook | Landline | Teleport Communications America |
| 630-481 | Oak Brook | Landline | Teleport Communications America |
| 630-482 | Mooseheart | Landline | Illinois Bell Tel |
| 630-483 | Hanover Park | Landline | Illinois Bell Tel |
| 630-484 | Western Springs | Wireless | New Cingular Wireless |
| 630-485 | Saint Charles | Landline | Ovation Communications Of Illinois |
| 630-486 | Montgomery | Landline | AT&T |
| 630-487 | Western Springs | Wireless | Verizon |
| 630-488 | Western Springs | Wireless | Verizon |
| 630-489 | Lombard | Landline | Intrado Communications |
| 630-490 | Chicago | Landline | Teleport Communications America |
| 630-491 | Elmhurst | Landline | Peerless Network Of Illinois |
| 630-492 | Geneva | Landline | Teleport Communications America |
| 630-493 | Woodridge | Landline | Illinois Bell Tel |
| 630-494 | Schaumburg | Wireless | New Cingular Wireless |
| 630-495 | Lombard | Landline | Illinois Bell Tel |
| 630-496 | Bensenville | Landline | Ovation Communications Of Illinois |
| 630-497 | Elgin | Landline | Illinois Bell Tel |
| 630-498 | Western Springs | Wireless | USA Mobility Wireless |
| 630-499 | Aurora | Landline | Illinois Bell Tel |
| 630-501 | Elmhurst | Landline | Comcast Phone Of Illinois |
| 630-502 | Wheeling | Wireless | New Cingular Wireless |
| 630-503 | Schaumburg | Landline | Teleport Communications America |
| 630-504 | Hanover Park | Landline | Teleport Communications America |
| 630-505 | Naperville | Landline | Illinois Bell Tel |
| 630-506 | Montgomery | Wireless | T-Mobile |
| 630-507 | Schaumburg | Wireless | New Cingular Wireless |
| 630-508 | Northbrook | Wireless | Verizon |
| 630-509 | Oak Brook | Landline | AT&T |
| 630-510 | Wheaton | Landline | Illinois Bell Tel |
| 630-512 | Woodridge | Landline | Illinois Bell Tel |
| 630-513 | Saint Charles | Landline | Illinois Bell Tel |
| 630-514 | Western Springs | Wireless | Sprint Spectrum |
| 630-515 | Woodridge | Landline | Illinois Bell Tel |
| 630-516 | Elmhurst | Landline | Illinois Bell Tel |
| 630-517 | Wheaton | Landline | Level 3 Communications |
| 630-518 | Montgomery | Landline | Mcimetro Access Transmission Services |
| 630-519 | Lombard | Landline | Teleport Communications America |
| 630-520 | Oak Brook | Landline | Teleport Communications America |
| 630-521 | Bensenville | Landline | Illinois Bell Tel |
| 630-522 | Oak Brook | Landline | Allegiance Telecom Of Illinois |
| 630-523 | Roselle | Landline | Ovation Communications Of Illinois |
| 630-524 | Saint Charles | Landline | Level 3 Communications |
| 630-525 | Schaumburg | Wireless | New Cingular Wireless |
| 630-526 | Mooseheart | Landline | Teleport Communications America |
| 630-527 | Naperville | Landline | Illinois Bell Tel |
| 630-528 | Western Springs | Wireless | Comcast Phone Of Illinois |
| 630-529 | Roselle | Landline | Illinois Bell Tel |
| 630-530 | Elmhurst | Landline | Illinois Bell Tel |
| 630-531 | Western Springs | Wireless | Verizon |
| 630-532 | Elmhurst | Landline | Ovation Communications Of Illinois |
| 630-533 | Northbrook | Wireless | Verizon |
| 630-534 | Glen Ellyn | Landline | Ovation Communications Of Illinois |
| 630-535 | Western Springs | Wireless | Indiana Paging Network |
| 630-536 | Naperville | Landline | Teleport Communications America |
| 630-537 | Oak Brook | Landline | Illinois Bell Tel |
| 630-538 | Sugar Grove | Wireless | T-Mobile |
| 630-539 | Roselle | Landline | Illinois Bell Tel |
| 630-540 | Hanover Park | Landline | Illinois Bell Tel |
| 630-541 | Woodridge | Landline | Teleport Communications America |
| 630-542 | Schaumburg | Wireless | New Cingular Wireless |
| 630-543 | Elmhurst | Landline | Illinois Bell Tel |
| 630-544 | Naperville | Landline | Ovation Communications Of Illinois |
| 630-545 | Glen Ellyn | Landline | Illinois Bell Tel |
| 630-546 | Elmhurst | Wireless | Sprint Spectrum |
| 630-547 | Mount Prospect | Landline | Level 3 Communications |
| 630-548 | Naperville | Landline | Illinois Bell Tel |
| 630-549 | Saint Charles | Landline | Teleport Communications America |
| 630-550 | Hanover Park | Landline | Ovation Communications Of Illinois |
| 630-551 | Oswego | Landline | Illinois Bell Tel |
| 630-552 | Plano | Landline | Illinois Bell Tel |
| 630-553 | Yorkville | Landline | Illinois Bell Tel |
| 630-554 | Oswego | Landline | Illinois Bell Tel |
| 630-556 | Big Rock | Landline | Illinois Bell Tel |
| 630-557 | Sugar Grove | Landline | Illinois Bell Tel |
| 630-558 | Schaumburg | Wireless | New Cingular Wireless |
| 630-559 | Elmhurst | Landline | Allegiance Telecom Of Illinois |
| 630-560 | Western Springs | Wireless | Level 3 Communications |
| 630-561 | Western Springs | Wireless | New Cingular Wireless |
| 630-562 | West Chicago | Landline | Illinois Bell Tel |
| 630-563 | Elmhurst | Landline | Level 3 Communications |
| 630-564 | Northbrook | Wireless | Verizon |
| 630-565 | Schaumburg | Wireless | New Cingular Wireless |
| 630-566 | Montgomery | Landline | Level 3 Communications |
| 630-567 | Western Springs | Wireless | Verizon |
| 630-568 | Oak Brook | Landline | AT&T |
| 630-569 | Northbrook | Wireless | Verizon |
| 630-570 | Oak Brook | Landline | Ovation Communications Of Illinois |
| 630-571 | Oak Brook | Landline | Illinois Bell Tel |
| 630-572 | Oak Brook | Landline | Illinois Bell Tel |
| 630-573 | Oak Brook | Landline | Illinois Bell Tel |
| 630-574 | Oak Brook | Landline | Illinois Bell Tel |
| 630-575 | Oak Brook | Landline | Illinois Bell Tel |
| 630-576 | Lombard | Landline | Ovation Communications Of Illinois |
| 630-577 | Naperville | Landline | Illinois Bell Tel |
| 630-578 | Geneva | Landline | Level 3 Communications |
| 630-579 | Naperville | Landline | Illinois Bell Tel |
| 630-580 | Wheaton | Landline | Ovation Communications Of Illinois |
| 630-581 | Oak Brook | Landline | AT&T |
| 630-582 | Roselle | Landline | Illinois Bell Tel |
| 630-583 | Western Springs | Wireless | USA Mobility Wireless |
| 630-584 | Saint Charles | Landline | Illinois Bell Tel |
| 630-585 | Aurora | Landline | Illinois Bell Tel |
| 630-586 | Oak Brook | Landline | Illinois Bell Tel |
| 630-587 | Saint Charles | Landline | Illinois Bell Tel |
| 630-588 | Wheaton | Landline | Illinois Bell Tel |
| 630-589 | Wood Dale | Landline | Mcimetro Access Transmission Services |
| 630-590 | Oak Brook | Landline | Level 3 Communications |
| 630-591 | Chicago | Landline | Illinois Bell Tel |
| 630-592 | Mount Prospect | Landline | Level 3 Communications |
| 630-593 | Mooseheart | Landline | Ovation Communications Of Illinois |
| 630-594 | Bensenville | Landline | Ovation Communications Of Illinois |
| 630-595 | Bensenville | Landline | Illinois Bell Tel |
| 630-596 | Naperville | Landline | Allegiance Telecom Of Illinois |
| 630-597 | Wheaton | Landline | Allegiance Telecom Of Illinois |
| 630-598 | Woodridge | Landline | Allegiance Telecom Of Illinois |
| 630-599 | Lombard | Landline | Allegiance Telecom Of Illinois |
| 630-600 | Elmhurst | Landline | Teleport Communications America |
| 630-601 | Western Springs | Wireless | New Cingular Wireless |
| 630-602 | Schaumburg | Wireless | New Cingular Wireless |
| 630-603 | Roselle | Wireless | Illinois Bell Tel |
| 630-605 | Naperville | Wireless | New Cingular Wireless |
| 630-606 | Western Springs | Wireless | Verizon |
| 630-607 | Elmhurst | Landline | Rcn Telecom Services Of Illinios |
| 630-608 | Oswego | Landline | Level 3 Communications |
| 630-609 | Schaumburg | Wireless | New Cingular Wireless |
| 630-610 | Schaumburg | Wireless | New Cingular Wireless |
| 630-612 | Roselle | Wireless | Illinois Bell Tel |
| 630-613 | Lombard | Landline | Teleport Communications America |
| 630-614 | Wheaton | Landline | First Communications |
| 630-615 | Naperville | Landline | First Communications |
| 630-616 | Bensenville | Landline | Illinois Bell Tel |
| 630-617 | Elmhurst | Landline | Illinois Bell Tel |
| 630-618 | Montgomery | Wireless | Sprint Spectrum |
| 630-619 | Western Springs | Wireless | Verizon |
| 630-620 | Lombard | Landline | Illinois Bell Tel |
| 630-621 | West Chicago | Landline | Level 3 Communications |
| 630-622 | Roselle | Landline | Allegiance Telecom Of Illinois |
| 630-623 | Oak Brook | Landline | Illinois Bell Tel |
| 630-624 | Schaumburg | Wireless | New Cingular Wireless |
| 630-625 | Itasca | Landline | Ovation Communications Of Illinois |
| 630-626 | Itasca | Landline | Global Crossing Local Services |
| 630-627 | Lombard | Landline | Illinois Bell Tel |
| 630-628 | Elmhurst | Landline | Illinois Bell Tel |
| 630-629 | Lombard | Landline | Illinois Bell Tel |
| 630-630 | Oswego | Landline | First Communications |
| 630-631 | Montgomery | Landline | Ovation Communications Of Illinois |
| 630-632 | Western Springs | Wireless | New Cingular Wireless |
| 630-633 | Willowbrook | Landline | Ovation Communications Of Illinois |
| 630-634 | Oak Brook | Landline | AT&T |
| 630-635 | Roselle | Landline | AT&T |
| 630-636 | Oswego | Landline | First Communications |
| 630-637 | Naperville | Landline | Illinois Bell Tel |
| 630-638 | Western Springs | Wireless | Verizon |
| 630-639 | West Chicago | Landline | Ovation Communications Of Illinois |
| 630-640 | Western Springs | Wireless | New Cingular Wireless |
| 630-641 | Schaumburg | Wireless | New Cingular Wireless |
| 630-642 | Western Springs | Wireless | New Cingular Wireless |
| 630-643 | Western Springs | Wireless | Verizon |
| 630-644 | Bensenville | Landline | Mcimetro Access Transmission Services |
| 630-645 | Oak Brook | Landline | Illinois Bell Tel |
| 630-646 | Naperville | Landline | Illinois Bell Tel |
| 630-647 | Itasca | Landline | Mcimetro Access Transmission Services |
| 630-648 | Schaumburg | Wireless | New Cingular Wireless |
| 630-649 | Naperville | Landline | Illinois Bell Tel |
| 630-650 | Northbrook | Wireless | Verizon |
| 630-651 | Northbrook | Wireless | Verizon |
| 630-652 | Lombard | Landline | Illinois Bell Tel |
| 630-653 | Wheaton | Landline | Illinois Bell Tel |
| 630-654 | Oak Brook | Landline | Illinois Bell Tel |
| 630-655 | Oak Brook | Landline | Illinois Bell Tel |
| 630-656 | Lombard | Landline | Mcimetro Access Transmission Services |
| 630-657 | Warrenville | Landline | Ovation Communications Of Illinois |
| 630-659 | Saint Charles | Landline | XO Communications |
| 630-660 | La Grange | Wireless | Sprint Spectrum |
| 630-661 | Western Springs | Wireless | Verizon |
| 630-662 | La Grange | Landline | Illinois Bell Tel |
| 630-663 | Woodridge | Landline | Illinois Bell Tel |
| 630-664 | Naperville | Wireless | Sprint Spectrum |
| 630-665 | Wheaton | Landline | Illinois Bell Tel |
| 630-666 | Elmhurst | Wireless | Sprint Spectrum |
| 630-667 | Western Springs | Wireless | Sprint Spectrum |
| 630-668 | Wheaton | Landline | Illinois Bell Tel |
| 630-669 | Northbrook | Wireless | Sprint Spectrum |
| 630-670 | Western Springs | Wireless | T-Mobile |
| 630-671 | Roselle | Landline | Illinois Bell Tel |
| 630-672 | Wood Dale | Landline | Mcimetro Access Transmission Services |
| 630-673 | Northbrook | Wireless | Sprint Spectrum |
| 630-674 | Northbrook | Wireless | Sprint Spectrum |
| 630-675 | Schaumburg | Wireless | Sprint Spectrum |
| 630-676 | Northbrook | Wireless | Verizon |
| 630-677 | Geneva | Wireless | T-Mobile |
| 630-678 | Lombard | Landline | Illinois Bell Tel |
| 630-679 | Lemont | Landline | Illinois Bell Tel |
| 630-680 | Western Springs | Wireless | American Messaging Services |
| 630-681 | Wheaton | Landline | Illinois Bell Tel |
| 630-682 | Wheaton | Landline | Illinois Bell Tel |
| 630-683 | River Forest | Wireless | USA Mobility Wireless |
| 630-684 | Oak Brook | Landline | Illinois Bell Tel |
| 630-685 | Lemont | Landline | Level 3 Communications |
| 630-686 | Oak Brook | Landline | Global Crossing Local Services |
| 630-687 | Naperville | Wireless | New Cingular Wireless |
| 630-688 | Elmhurst | Wireless | Sprint Spectrum |
| 630-689 | Naperville | Landline | Global Crossing Local Services |
| 630-690 | Wheaton | Landline | Illinois Bell Tel |
| 630-691 | Lombard | Landline | Illinois Bell Tel |
| 630-692 | Aurora | Landline | Illinois Bell Tel |
| 630-693 | Lombard | Landline | Illinois Bell Tel |
| 630-694 | Bensenville | Landline | Illinois Bell Tel |
| 630-695 | Northbrook | Wireless | American Messaging Services |
| 630-696 | Naperville | Landline | Mcimetro Access Transmission Services |
| 630-697 | La Grange | Wireless | Sprint Spectrum |
| 630-698 | Western Springs | Wireless | Verizon |
| 630-699 | Naperville | Wireless | New Cingular Wireless |
| 630-701 | Montgomery | Wireless | T-Mobile |
| 630-702 | Schaumburg | Wireless | New Cingular Wireless |
| 630-703 | Western Springs | Wireless | New Cingular Wireless |
| 630-704 | Western Springs | Wireless | American Messaging Services |
| 630-705 | Lombard | Landline | Illinois Bell Tel |
| 630-706 | Oak Brook | Landline | Illinois Bell Tel |
| 630-707 | Northbrook | Wireless | Verizon |
| 630-708 | Yorkville | Landline | AT&T |
| 630-709 | Schaumburg | Wireless | Sprint Spectrum |
| 630-710 | Western Springs | Wireless | Verizon |
| 630-712 | Western Springs | Wireless | Verizon |
| 630-713 | Naperville | Landline | Illinois Bell Tel |
| 630-714 | Chicago | Wireless | American Messaging Services |
| 630-715 | Saint Charles | Wireless | New Cingular Wireless |
| 630-716 | Oak Brook | Landline | Teleport Communications America |
| 630-717 | Naperville | Landline | Illinois Bell Tel |
| 630-718 | Naperville | Landline | Illinois Bell Tel |
| 630-719 | Woodridge | Landline | Illinois Bell Tel |
| 630-720 | Montgomery | Wireless | Verizon |
| 630-721 | Northbrook | Wireless | Verizon |
| 630-722 | Oak Brook | Wireless | Illinois Bell Tel |
| 630-723 | Aurora | Landline | XO Communications |
| 630-724 | Woodridge | Landline | Illinois Bell Tel |
| 630-725 | Woodridge | Landline | Illinois Bell Tel |
| 630-726 | Western Springs | Wireless | Verizon |
| 630-727 | Western Springs | Wireless | American Messaging Services |
| 630-728 | La Grange | Wireless | Sprint Spectrum |
| 630-729 | Woodridge | Landline | Level 3 Communications |
| 630-730 | Elgin | Wireless | New Cingular Wireless |
| 630-731 | Montgomery | Wireless | Sprint Spectrum |
| 630-732 | Northbrook | Wireless | Verizon |
| 630-733 | Big Rock | Landline | Teleport Communications America |
| 630-734 | Oak Brook | Landline | Illinois Bell Tel |
| 630-735 | Itasca | Landline | XO Communications |
| 630-736 | Hanover Park | Landline | Illinois Bell Tel |
| 630-737 | Woodridge | Landline | Illinois Bell Tel |
| 630-738 | Western Springs | Wireless | Verizon |
| 630-739 | Lemont | Landline | Illinois Bell Tel |
| 630-740 | Montgomery | Wireless | Verizon |
| 630-741 | Bensenville | Landline | XO Communications |
| 630-742 | Naperville | Wireless | Sprint Spectrum |
| 630-743 | Woodridge | Landline | Teleport Communications America |
| 630-744 | Schaumburg | Wireless | New Cingular Wireless |
| 630-745 | Northbrook | Wireless | Sprint Spectrum |
| 630-746 | Sugar Grove | Wireless | Verizon |
| 630-747 | La Grange | Wireless | Sprint Spectrum |
| 630-748 | Lombard | Landline | Global Crossing Local Services |
| 630-749 | Elmhurst | Landline | Global Crossing Local Services |
| 630-750 | Western Springs | Wireless | New Cingular Wireless |
| 630-751 | Schaumburg | Wireless | New Cingular Wireless |
| 630-752 | Wheaton | Landline | Illinois Bell Tel |
| 630-753 | Naperville | Landline | Illinois Bell Tel |
| 630-754 | Willowbrook | Landline | XO Communications |
| 630-755 | Willowbrook | Landline | Teleport Communications America |
| 630-756 | Oak Brook | Landline | Global Crossing Local Services |
| 630-757 | Bensenville | Landline | Global Crossing Local Services |
| 630-758 | Elmhurst | Landline | Illinois Bell Tel |
| 630-759 | Lemont | Landline | Illinois Bell Tel |
| 630-760 | Itasca | Landline | Ovation Communications Of Illinois |
| 630-761 | Mooseheart | Landline | Illinois Bell Tel |
| 630-762 | Saint Charles | Landline | Illinois Bell Tel |
| 630-763 | Montgomery | Wireless | USA Mobility Wireless |
| 630-764 | Schaumburg | Wireless | New Cingular Wireless |
| 630-765 | Wheaton | Wireless | New Cingular Wireless |
| 630-766 | Bensenville | Landline | Illinois Bell Tel |
| 630-767 | Schaumburg | Wireless | New Cingular Wireless |
| 630-768 | Naperville | Wireless | Sprint Spectrum |
| 630-769 | Woodridge | Landline | Illinois Bell Tel |
| 630-770 | Montgomery | Wireless | Sprint Spectrum |
| 630-771 | Lemont | Landline | Illinois Bell Tel |
| 630-772 | Northbrook | Wireless | Verizon |
| 630-773 | Itasca | Landline | Illinois Bell Tel |
| 630-774 | Western Springs | Wireless | Sprint Spectrum |
| 630-775 | Itasca | Landline | Illinois Bell Tel |
| 630-776 | Elmhurst | Wireless | Sprint Spectrum |
| 630-777 | Sugar Grove | Wireless | Verizon |
| 630-778 | Naperville | Landline | Illinois Bell Tel |
| 630-779 | Winfield | Wireless | New Cingular Wireless |
| 630-780 | Naperville | Wireless | Verizon |
| 630-781 | Western Springs | Wireless | Sprint Spectrum |
| 630-782 | Elmhurst | Landline | Illinois Bell Tel |
| 630-783 | Lemont | Landline | Illinois Bell Tel |
| 630-784 | Wheaton | Landline | Illinois Bell Tel |
| 630-785 | Lombard | Landline | AT&T |
| 630-786 | Woodridge | Landline | Global Crossing Local Services |
| 630-787 | Bensenville | Landline | Illinois Bell Tel |
| 630-788 | Montgomery | Wireless | T-Mobile |
| 630-789 | Oak Brook | Landline | Illinois Bell Tel |
| 630-790 | Glen Ellyn | Landline | Illinois Bell Tel |
| 630-791 | Warrenville | Landline | Teleport Communications America |
| 630-792 | Lombard | Landline | Illinois Bell Tel |
| 630-793 | Glen Ellyn | Landline | Global Crossing Local Services |
| 630-794 | Oak Brook | Landline | Illinois Bell Tel |
| 630-795 | Woodridge | Landline | Illinois Bell Tel |
| 630-796 | Chicago | Landline | Bandwidth.com |
| 630-797 | Saint Charles | Landline | Mcimetro Access Transmission Services |
| 630-798 | Naperville | Landline | Illinois Bell Tel |
| 630-799 | Naperville | Landline | Illinois Bell Tel |
| 630-800 | Aurora | Wireless | Verizon |
| 630-801 | Aurora | Landline | Illinois Bell Tel |
| 630-802 | Sugar Grove | Wireless | T-Mobile |
| 630-803 | Montgomery | Wireless | Sprint Spectrum |
| 630-804 | Schaumburg | Wireless | New Cingular Wireless |
| 630-805 | La Grange | Wireless | New Cingular Wireless |
| 630-806 | Montgomery | Wireless | Sprint Spectrum |
| 630-807 | Schaumburg | Wireless | New Cingular Wireless |
| 630-808 | Elmhurst | Wireless | Sprint Spectrum |
| 630-809 | Montgomery | Wireless | Sprint Spectrum |
| 630-810 | Woodridge | Landline | Illinois Bell Tel |
| 630-812 | Lombard | Wireless | New Cingular Wireless |
| 630-813 | Naperville | Landline | Illinois Bell Tel |
| 630-814 | Schaumburg | Wireless | New Cingular Wireless |
| 630-815 | West Chicago | Wireless | New Cingular Wireless |
| 630-816 | Northbrook | Wireless | Sprint Spectrum |
| 630-817 | Northbrook | Wireless | Verizon |
| 630-818 | West Chicago | Landline | Mcimetro Access Transmission Services |
| 630-819 | Western Springs | Wireless | New Cingular Wireless |
| 630-820 | Aurora | Landline | Illinois Bell Tel |
| 630-821 | Warrenville | Landline | Mcimetro Access Transmission Services |
| 630-822 | Western Springs | Wireless | New Cingular Wireless |
| 630-823 | Wood Dale | Landline | Mcimetro Access Transmission Services |
| 630-824 | Woodridge | Landline | Ovation Communications Of Illinois |
| 630-825 | Roselle | Landline | Ovation Communications Of Illinois |
| 630-826 | Schaumburg | Wireless | New Cingular Wireless |
| 630-827 | Lombard | Landline | Ovation Communications Of Illinois |
| 630-828 | Western Springs | Wireless | Teleport Communications America |
| 630-829 | Woodridge | Landline | Illinois Bell Tel |
| 630-830 | Hanover Park | Landline | Illinois Bell Tel |
| 630-831 | Western Springs | Wireless | Verizon |
| 630-832 | Elmhurst | Landline | Illinois Bell Tel |
| 630-833 | Elmhurst | Landline | Illinois Bell Tel |
| 630-834 | Elmhurst | Landline | Illinois Bell Tel |
| 630-835 | Elmhurst | Landline | Ovation Communications Of Illinois |
| 630-836 | Warrenville | Landline | Illinois Bell Tel |
| 630-837 | Hanover Park | Landline | Illinois Bell Tel |
| 630-838 | River Forest | Wireless | USA Mobility Wireless |
| 630-839 | Naperville | Landline | Level 3 Communications |
| 630-840 | Mooseheart | Landline | Illinois Bell Tel |
| 630-841 | Western Springs | Wireless | New Cingular Wireless |
| 630-842 | Western Springs | Wireless | New Cingular Wireless |
| 630-843 | Northbrook | Wireless | Verizon |
| 630-844 | Aurora | Landline | Illinois Bell Tel |
| 630-845 | Geneva | Landline | Illinois Bell Tel |
| 630-846 | Western Springs | Wireless | Verizon |
| 630-847 | Lombard | Landline | Ymax Communications |
| 630-848 | Naperville | Landline | Illinois Bell Tel |
| 630-849 | Montgomery | Wireless | T-Mobile |
| 630-850 | Oak Brook | Landline | Illinois Bell Tel |
| 630-851 | Aurora | Landline | Illinois Bell Tel |
| 630-852 | Woodridge | Landline | Illinois Bell Tel |
| 630-853 | Naperville | Wireless | New Cingular Wireless |
| 630-854 | Naperville | Wireless | T-Mobile |
| 630-855 | Hanover Park | Landline | Teleport Communications America |
| 630-856 | Oak Brook | Landline | Illinois Bell Tel |
| 630-857 | Naperville | Landline | Illinois Bell Tel |
| 630-858 | Glen Ellyn | Landline | Illinois Bell Tel |
| 630-859 | Aurora | Landline | Illinois Bell Tel |
| 630-860 | Bensenville | Landline | Illinois Bell Tel |
| 630-861 | Oak Brook | Landline | Mcimetro Access Transmission Services |
| 630-862 | Aurora | Landline | Illinois Bell Tel |
| 630-863 | Willowbrook | Wireless | T-Mobile |
| 630-864 | Naperville | Wireless | T-Mobile |
| 630-865 | Western Springs | Wireless | Sprint Spectrum |
| 630-866 | Glen Ellyn | Landline | Teleport Communications America |
| 630-867 | Western Springs | Wireless | USA Mobility Wireless |
| 630-868 | Mount Prospect | Landline | Level 3 Communications |
| 630-869 | Woodridge | Landline | Peerless Network Of Illinois |
| 630-870 | Montgomery | Landline | Teleport Communications America |
| 630-871 | Wheaton | Landline | Illinois Bell Tel |
| 630-872 | Roselle | Landline | Illinois Bell Tel |
| 630-873 | Mount Prospect | Landline | Level 3 Communications |
| 630-874 | Wood Dale | Landline | Mcimetro Access Transmission Services |
| 630-875 | Itasca | Landline | Illinois Bell Tel |
| 630-876 | West Chicago | Landline | Illinois Bell Tel |
| 630-877 | West Chicago | Wireless | New Cingular Wireless |
| 630-878 | Western Springs | Wireless | Sprint Spectrum |
| 630-879 | Mooseheart | Landline | Illinois Bell Tel |
| 630-880 | Western Springs | Wireless | New Cingular Wireless |
| 630-881 | Naperville | Wireless | New Cingular Wireless |
| 630-882 | Yorkville | Landline | AT&T |
| 630-883 | Elgin | Landline | Level 3 Communications |
| 630-884 | Big Rock | Landline | XO Communications |
| 630-885 | Naperville | Wireless | T-Mobile |
| 630-886 | La Grange | Wireless | Sprint Spectrum |
| 630-887 | Oak Brook | Landline | Illinois Bell Tel |
| 630-888 | Aurora | Wireless | T-Mobile |
| 630-889 | Lombard | Landline | Illinois Bell Tel |
| 630-890 | Wheaton | Wireless | T-Mobile |
| 630-891 | Oak Brook | Landline | Ovation Communications Of Illinois |
| 630-892 | Aurora | Landline | Illinois Bell Tel |
| 630-893 | Roselle | Landline | Illinois Bell Tel |
| 630-894 | Roselle | Landline | Illinois Bell Tel |
| 630-895 | Western Springs | Wireless | USA Mobility Wireless |
| 630-896 | Aurora | Landline | Illinois Bell Tel |
| 630-897 | Aurora | Landline | Illinois Bell Tel |
| 630-898 | Aurora | Landline | Illinois Bell Tel |
| 630-899 | Schaumburg | Wireless | New Cingular Wireless |
| 630-901 | Naperville | Wireless | Sprint Spectrum |
| 630-902 | Wheeling | Wireless | New Cingular Wireless |
| 630-903 | Elmhurst | Wireless | Sprint Spectrum |
| 630-904 | Naperville | Landline | Illinois Bell Tel |
| 630-905 | Roselle | Landline | Illinois Bell Tel |
| 630-906 | Aurora | Landline | Illinois Bell Tel |
| 630-907 | Aurora | Landline | Illinois Bell Tel |
| 630-908 | Western Springs | Wireless | New Cingular Wireless |
| 630-909 | Wheaton | Landline | Ovation Communications Of Illinois |
| 630-910 | Woodridge | Landline | Illinois Bell Tel |
| 630-912 | Roselle | Landline | Teleport Communications America |
| 630-913 | Wheeling | Wireless | New Cingular Wireless |
| 630-914 | Lockport | Landline | Illinois Bell Tel |
| 630-915 | Oak Brook | Wireless | T-Mobile |
| 630-916 | Lombard | Landline | Illinois Bell Tel |
| 630-917 | Schaumburg | Wireless | New Cingular Wireless |
| 630-918 | Western Springs | Wireless | Sprint Spectrum |
| 630-919 | Schaumburg | Landline | Teleport Communications America |
| 630-920 | Oak Brook | Landline | Illinois Bell Tel |
| 630-921 | Summit Argo | Wireless | Verizon |
| 630-922 | Naperville | Landline | Illinois Bell Tel |
| 630-923 | Wheaton | Landline | T-Mobile |
| 630-924 | Roselle | Landline | Illinois Bell Tel |
| 630-925 | Lombard | Landline | XO Communications |
| 630-926 | Western Springs | Wireless | Sprint Spectrum |
| 630-927 | Western Springs | Wireless | Verizon |
| 630-928 | Oak Brook | Landline | Illinois Bell Tel |
| 630-929 | Woodridge | Landline | Level 3 Communications |
| 630-930 | Elmhurst | Landline | Sprint Spectrum |
| 630-931 | Oak Brook | Landline | Teleport Communications America |
| 630-932 | Lombard | Landline | Illinois Bell Tel |
| 630-933 | Wheaton | Landline | Illinois Bell Tel |
| 630-934 | Elburn | Landline | AT&T |
| 630-935 | Lombard | Wireless | T-Mobile |
| 630-936 | Elmhurst | Landline | Level 3 Communications |
| 630-937 | Mooseheart | Landline | Ovation Communications Of Illinois |
| 630-938 | Geneva | Landline | Level 3 Communications |
| 630-939 | Northbrook | Wireless | Verizon |
| 630-940 | Saint Charles | Landline | Ovation Communications Of Illinois |
| 630-941 | Elmhurst | Landline | Illinois Bell Tel |
| 630-942 | Glen Ellyn | Landline | Illinois Bell Tel |
| 630-943 | Geneva | Landline | Teleport Communications America |
| 630-944 | Woodridge | Landline | Mcimetro Access Transmission Services |
| 630-945 | Saint Charles | Landline | Mcimetro Access Transmission Services |
| 630-946 | Naperville | Landline | Ovation Communications Of Illinois |
| 630-947 | Aurora | Landline | Ovation Communications Of Illinois |
| 630-948 | Bensenville | Landline | Level 3 Communications |
| 630-949 | Wheaton | Landline | Paetec Communications |
| 630-951 | Northbrook | Wireless | Verizon |
| 630-952 | Montgomery | Landline | First Communications |
| 630-953 | Lombard | Landline | Illinois Bell Tel |
| 630-954 | Oak Brook | Landline | Illinois Bell Tel |
| 630-955 | Naperville | Landline | Illinois Bell Tel |
| 630-956 | Elmhurst | Landline | Illinois Bell Tel |
| 630-957 | West Chicago | Landline | Comcast Phone Of Illinois |
| 630-960 | Woodridge | Landline | Illinois Bell Tel |
| 630-961 | Naperville | Landline | Illinois Bell Tel |
| 630-962 | Aurora | Landline | Level 3 Communications |
| 630-963 | Woodridge | Landline | Illinois Bell Tel |
| 630-964 | Woodridge | Landline | Illinois Bell Tel |
| 630-965 | Hanover Park | Wireless | T-Mobile |
| 630-966 | Aurora | Landline | Illinois Bell Tel |
| 630-967 | Woodridge | Landline | Comcast Phone Of Illinois |
| 630-968 | Woodridge | Landline | Illinois Bell Tel |
| 630-969 | Woodridge | Landline | Illinois Bell Tel |
| 630-970 | Wheeling | Wireless | New Cingular Wireless |
| 630-971 | Woodridge | Landline | Illinois Bell Tel |
| 630-972 | Lemont | Landline | Illinois Bell Tel |
| 630-973 | Roselle | Wireless | Sprint Spectrum |
| 630-974 | Oak Brook | Landline | Level 3 Communications |
| 630-975 | Northbrook | Wireless | Verizon |
| 630-977 | Schaumburg | Wireless | New Cingular Wireless |
| 630-978 | Aurora | Landline | Illinois Bell Tel |
| 630-979 | Naperville | Landline | Illinois Bell Tel |
| 630-980 | Roselle | Landline | Illinois Bell Tel |
| 630-981 | Woodridge | Landline | XO Communications |
| 630-982 | Big Rock | Landline | Level 3 Communications |
| 630-983 | Naperville | Landline | Illinois Bell Tel |
| 630-984 | Glen Ellyn | Landline | Level 3 Communications |
| 630-985 | Woodridge | Landline | Illinois Bell Tel |
| 630-986 | Oak Brook | Landline | Illinois Bell Tel |
| 630-987 | Schaumburg | Wireless | New Cingular Wireless |
| 630-988 | Western Springs | Wireless | Verizon |
| 630-989 | Northbrook | Wireless | Verizon |
| 630-990 | Oak Brook | Landline | Illinois Bell Tel |
| 630-991 | Woodridge | Wireless | New Cingular Wireless |
| 630-992 | Northbrook | Wireless | Verizon |
| 630-993 | Elmhurst | Landline | Illinois Bell Tel |
| 630-994 | Roselle | Landline | Mcimetro Access Transmission Services |
| 630-995 | Naperville | Wireless | New Cingular Wireless |
| 630-996 | Western Springs | Wireless | USA Mobility Wireless |
| 630-997 | Schaumburg | Wireless | New Cingular Wireless |
| 630-998 | Geneva | Landline | Mcimetro Access Transmission Services |
| 630-999 | Sugar Grove | Landline | T-Mobile |