| 224-200 | Arlington Heights | Wireless | New Cingular Wireless |
| 224-201 | Arlington Heights | Wireless | New Cingular Wireless |
| 224-202 | Arlington Heights | Wireless | New Cingular Wireless |
| 224-203 | Northbrook | Wireless | Verizon |
| 224-204 | Chicago | Landline | Onvoy |
| 224-205 | Wood Dale | Wireless | Verizon |
| 224-206 | Libertyville | Landline | Tds Metrocom |
| 224-207 | Libertyville | Landline | Comcast Phone Of Illinois |
| 224-208 | Hanover Park | Landline | AT&T |
| 224-209 | Lake In The Hills | Wireless | New Cingular Wireless |
| 224-210 | Arlington Heights | Wireless | Sprint Spectrum |
| 224-212 | Lake Forest | Landline | Illinois Bell Tel |
| 224-213 | Northbrook | Wireless | Verizon |
| 224-214 | Waukegan | Wireless | New Cingular Wireless |
| 224-215 | Wilmette | Landline | Level 3 Communications |
| 224-216 | Winnetka | Wireless | New Cingular Wireless |
| 224-217 | Des Plaines | Wireless | Verizon |
| 224-218 | Hampshire | Landline | AT&T |
| 224-219 | Waukegan | Landline | Onvoy |
| 224-220 | Chicago | Wireless | Sprint Spectrum |
| 224-221 | Northbrook | Wireless | New Cingular Wireless |
| 224-222 | Wood Dale | Landline | Mcimetro Access Transmission Services |
| 224-223 | Northbrook | Wireless | New Cingular Wireless |
| 224-225 | Fox Lake | Landline | AT&T |
| 224-226 | Northbrook | Wireless | Sprint Spectrum |
| 224-227 | Elgin | Wireless | Verizon |
| 224-228 | Elgin | Wireless | Sprint Spectrum |
| 224-229 | Des Plaines | Wireless | Verizon |
| 224-230 | Elgin | Wireless | Verizon |
| 224-231 | Schaumburg | Landline | Teleport Communications America |
| 224-232 | Arlington Heights | Landline | Illinois Bell Tel |
| 224-233 | Skokie | Landline | First Communications |
| 224-234 | Northbrook | Wireless | Verizon |
| 224-235 | Northbrook | Wireless | Sprint Spectrum |
| 224-236 | Hanover Park | Landline | Bandwidth.com |
| 224-237 | Waukegan | Wireless | Sprint Spectrum |
| 224-238 | South Elgin | Wireless | Verizon |
| 224-239 | Elgin | Wireless | Verizon |
| 224-240 | Dundee | Landline | Verizon |
| 224-241 | Lake In The Hills | Wireless | New Cingular Wireless |
| 224-242 | Elgin | Wireless | Verizon |
| 224-243 | Fox Lake | Wireless | New Cingular Wireless |
| 224-244 | Des Plaines | Wireless | Verizon |
| 224-245 | Arlington Heights | Wireless | Sprint Spectrum |
| 224-246 | Northbrook | Wireless | Verizon |
| 224-247 | Arlington Heights | Wireless | T-Mobile |
| 224-248 | Arlington Heights | Wireless | Sprint Spectrum |
| 224-249 | Lake In The Hills | Landline | Onvoy |
| 224-250 | Des Plaines | Wireless | Verizon |
| 224-251 | Skokie | Landline | Illinois Bell Tel |
| 224-252 | Grayslake | Landline | Bandwidth.com |
| 224-253 | Lake In The Hills | Wireless | T-Mobile |
| 224-254 | Des Plaines | Wireless | Verizon |
| 224-255 | Winnetka | Wireless | New Cingular Wireless |
| 224-256 | Lake In The Hills | Wireless | T-Mobile |
| 224-257 | Des Plaines | Landline | Onvoy |
| 224-258 | Arlington Heights | Wireless | T-Mobile |
| 224-259 | Antioch | Landline | Onvoy |
| 224-260 | Glenview | Wireless | Sprint Spectrum |
| 224-261 | Northbrook | Wireless | Sprint Spectrum |
| 224-263 | Huntley | Landline | Onvoy |
| 224-264 | Des Plaines | Landline | AT&T |
| 224-265 | Mount Prospect | Landline | First Communications |
| 224-266 | Mount Prospect | Landline | Teleport Communications America |
| 224-267 | Antioch | Landline | Level 3 Communications |
| 224-268 | Elgin | Wireless | T-Mobile |
| 224-269 | Winnetka | Landline | Bandwidth.com |
| 224-270 | Round Lake | Landline | Mcimetro Access Transmission Services |
| 224-271 | Lake Forest | Landline | Teleport Communications America |
| 224-272 | Zion | Landline | Level 3 Communications |
| 224-273 | Arlington Heights | Landline | Teleport Communications America |
| 224-274 | Lincolnshire | Landline | Teleport Communications America |
| 224-275 | Des Plaines | Wireless | Verizon |
| 224-276 | Elgin | Wireless | T-Mobile |
| 224-277 | Northbrook | Wireless | Verizon |
| 224-278 | Bensenville | Landline | Mcimetro Access Transmission Services |
| 224-279 | Wheeling | Wireless | New Cingular Wireless |
| 224-280 | Waukegan | Wireless | Sprint Spectrum |
| 224-281 | Elgin | Wireless | T-Mobile |
| 224-283 | Des Plaines | Wireless | Verizon |
| 224-284 | Deerfield | Wireless | T-Mobile |
| 224-285 | Des Plaines | Wireless | New Cingular Wireless |
| 224-286 | Lake Zurich | Landline | Level 3 Communications |
| 224-287 | Northbrook | Wireless | Verizon |
| 224-288 | Barrington | Wireless | New Cingular Wireless |
| 224-289 | Des Plaines | Wireless | T-Mobile |
| 224-290 | Elgin | Landline | Metro Fibernet |
| 224-291 | Elgin | Wireless | Verizon |
| 224-292 | Vernon Hills | Wireless | New Cingular Wireless |
| 224-293 | Dundee | Landline | Illinois Bell Tel |
| 224-294 | Libertyville | Wireless | T-Mobile |
| 224-295 | Palatine | Wireless | T-Mobile |
| 224-296 | Chicago | Landline | Onvoy |
| 224-297 | Des Plaines | Wireless | Verizon |
| 224-298 | Grayslake | Landline | Onvoy |
| 224-299 | Oak Brook | Landline | Teleport Communications America |
| 224-300 | Deerfield | Landline | Tds Metrocom |
| 224-301 | Des Plaines | Wireless | Verizon |
| 224-302 | Waukegan | Landline | Illinois Bell Tel |
| 224-303 | Waukegan | Wireless | New Cingular Wireless |
| 224-304 | Zion | Landline | Ovation Communications Of Illinois |
| 224-305 | Northbrook | Wireless | Sprint Spectrum |
| 224-306 | Northbrook | Wireless | Sprint Spectrum |
| 224-307 | Evanston | Wireless | New Cingular Wireless |
| 224-308 | Round Lake | Wireless | T-Mobile |
| 224-310 | Arlington Heights | Landline | Fusion Communications |
| 224-313 | Wheeling | Landline | Onvoy |
| 224-314 | Arlington Heights | Landline | Teleport Communications America |
| 224-315 | Des Plaines | Wireless | Verizon |
| 224-316 | Northbrook | Wireless | Verizon |
| 224-317 | Lake Forest | Landline | Teleport Communications America |
| 224-318 | Arlington Heights | Landline | Comcast Phone Of Illinois |
| 224-319 | Des Plaines | Landline | Bandwidth.com |
| 224-320 | Lake Zurich | Landline | First Communications |
| 224-321 | Waukegan | Wireless | Sprint Spectrum |
| 224-322 | Arlington Heights | Wireless | T-Mobile |
| 224-323 | Arlington Heights | Wireless | New Cingular Wireless |
| 224-324 | Arlington Heights | Wireless | New Cingular Wireless |
| 224-325 | Elgin | Wireless | Verizon |
| 224-326 | Mount Prospect | Landline | Comcast Phone Of Illinois |
| 224-327 | Vernon Hills | Landline | Teleport Communications America |
| 224-328 | Winnetka | Landline | Onvoy |
| 224-329 | Schaumburg | Wireless | New Cingular Wireless |
| 224-330 | Northbrook | Landline | XO Communications |
| 224-332 | Lake Forest | Landline | Teleport Communications America |
| 224-333 | Lake In The Hills | Landline | Comcast Phone Of Illinois |
| 224-334 | Arlington Heights | Wireless | T-Mobile |
| 224-335 | Antioch | Landline | Stratus Networks |
| 224-336 | Northbrook | Wireless | Sprint Spectrum |
| 224-337 | Fox Lake | Wireless | New Cingular Wireless |
| 224-338 | Round Lake | Landline | Comcast Phone Of Illinois |
| 224-339 | Elgin | Wireless | Verizon |
| 224-340 | Des Plaines | Wireless | Verizon |
| 224-341 | Lake In The Hills | Landline | Verizon |
| 224-342 | Arlington Heights | Landline | Fractel |
| 224-343 | Northbrook | Wireless | Sprint Spectrum |
| 224-344 | Wilmette | Landline | Onvoy |
| 224-345 | Arlington Heights | Wireless | New Cingular Wireless |
| 224-346 | Lake Villa | Landline | Fractel |
| 224-347 | Arlington Heights | Landline | Mcimetro Access Transmission Services |
| 224-348 | Lake In The Hills | Landline | Fractel |
| 224-349 | Elgin | Landline | T-Mobile |
| 224-350 | Chicago | Landline | Stratus Networks |
| 224-351 | Lincolnshire | Landline | Mcimetro Access Transmission Services |
| 224-352 | Lincolnshire | Landline | Mcimetro Access Transmission Services |
| 224-353 | Roselle | Landline | Sigecom |
| 224-354 | Des Plaines | Landline | Vonage America |
| 224-355 | Northbrook | Wireless | Sprint Spectrum |
| 224-356 | Oak Brook | Landline | Ymax Communications |
| 224-357 | Cary | Landline | AT&T |
| 224-358 | Vernon Hills | Wireless | New Cingular Wireless |
| 224-359 | Elgin | Landline | First Communications |
| 224-360 | Vernon Hills | Landline | Bandwidth.com |
| 224-361 | Des Plaines | Landline | Illinois Bell Tel |
| 224-362 | Zion | Landline | Fractel |
| 224-363 | Elgin | Wireless | T-Mobile |
| 224-364 | Evanston | Landline | Illinois Bell Tel |
| 224-365 | Northbrook | Wireless | Ymax Communications |
| 224-366 | Mount Prospect | Landline | Level 3 Communications |
| 224-367 | Dundee | Landline | Fractel |
| 224-368 | Arlington Heights | Wireless | T-Mobile |
| 224-369 | Waukegan | Wireless | T-Mobile |
| 224-371 | Grayslake | Landline | Onvoy |
| 224-372 | Lake Villa | Landline | AT&T |
| 224-373 | Chicago | Wireless | Verizon |
| 224-374 | Northbrook | Wireless | Verizon |
| 224-375 | Lake In The Hills | Wireless | New Cingular Wireless |
| 224-377 | Lincolnshire | Wireless | Sprint Spectrum |
| 224-381 | Waukegan | Wireless | T-Mobile |
| 224-383 | Northbrook | Landline | Comcast Phone Of Illinois |
| 224-385 | Barrington | Wireless | T-Mobile |
| 224-386 | Palatine | Wireless | T-Mobile |
| 224-387 | Arlington Heights | Wireless | Sprint Spectrum |
| 224-388 | Harwood Heights | Wireless | T-Mobile |
| 224-392 | Northbrook | Wireless | T-Mobile |
| 224-399 | Waukegan | Landline | Illinois Bell Tel |
| 224-400 | Arlington Heights | Landline | XO Communications |
| 224-401 | Lake In The Hills | Wireless | New Cingular Wireless |
| 224-402 | South Elgin | Wireless | T-Mobile |
| 224-404 | Mount Prospect | Landline | Illinois Bell Tel |
| 224-405 | Highland Park | Landline | Level 3 Communications |
| 224-406 | Northbrook | Wireless | Verizon |
| 224-407 | Elgin | Wireless | Verizon |
| 224-408 | Mount Prospect | Landline | Comcast Phone Of Illinois |
| 224-409 | Arlington Heights | Wireless | T-Mobile |
| 224-410 | Lake In The Hills | Wireless | T-Mobile |
| 224-412 | Northbrook | Wireless | Verizon |
| 224-413 | Waukegan | Wireless | T-Mobile |
| 224-414 | Bensenville | Landline | Choice One Comm Il |
| 224-415 | Northbrook | Wireless | T-Mobile |
| 224-419 | Waukegan | Wireless | New Cingular Wireless |
| 224-420 | Evanston | Wireless | New Cingular Wireless |
| 224-421 | Arlington Heights | Wireless | T-Mobile |
| 224-422 | Mount Prospect | Wireless | Verizon |
| 224-423 | Des Plaines | Wireless | Verizon |
| 224-424 | Libertyville | Landline | Local Access |
| 224-425 | Harwood Heights | Wireless | T-Mobile |
| 224-426 | Fox Lake | Wireless | New Cingular Wireless |
| 224-427 | Barrington | Wireless | T-Mobile |
| 224-428 | Lake In The Hills | Wireless | T-Mobile |
| 224-430 | Waukegan | Wireless | New Cingular Wireless |
| 224-432 | Glenview | Wireless | T-Mobile |
| 224-433 | Vernon Hills | Wireless | T-Mobile |
| 224-434 | Wheeling | Wireless | New Cingular Wireless |
| 224-435 | Glenview | Wireless | T-Mobile |
| 224-436 | Lake Forest | Wireless | T-Mobile |
| 224-440 | Waukegan | Wireless | New Cingular Wireless |
| 224-441 | Waukegan | Wireless | New Cingular Wireless |
| 224-442 | River Grove | Landline | Bandwidth.com |
| 224-443 | Des Plaines | Wireless | Verizon |
| 224-444 | Lake Villa | Landline | Illinois Bell Tel |
| 224-451 | Barrington | Landline | Onvoy |
| 224-456 | Northbrook | Landline | Verizon |
| 224-458 | Northbrook | Wireless | Verizon |
| 224-465 | Arlington Heights | Wireless | Sprint Spectrum |
| 224-469 | Waukegan | Wireless | T-Mobile |
| 224-470 | Skokie | Landline | Comcast Phone Of Illinois |
| 224-473 | Waukegan | Landline | Mcimetro Access Transmission Services |
| 224-475 | Palatine | Landline | Comcast Phone Of Illinois |
| 224-477 | Des Plaines | Wireless | T-Mobile |
| 224-478 | Des Plaines | Landline | Level 3 Communications |
| 224-479 | Northbrook | Wireless | T-Mobile |
| 224-480 | Waukegan | Wireless | New Cingular Wireless |
| 224-484 | Dundee | Landline | Comcast Phone Of Illinois |
| 224-487 | Cary | Landline | Onvoy |
| 224-488 | Glenview | Landline | Fractel |
| 224-489 | Palatine | Wireless | Sprint Spectrum |
| 224-499 | Arlington Heights | Landline | Fractel |
| 224-500 | Des Plaines | Wireless | Verizon |
| 224-501 | Northbrook | Wireless | Verizon |
| 224-503 | Northbrook | Wireless | T-Mobile |
| 224-504 | Libertyville | Wireless | T-Mobile |
| 224-505 | Winnetka | Landline | Onvoy |
| 224-507 | Deerfield | Wireless | New Cingular Wireless |
| 224-508 | Elgin | Wireless | T-Mobile |
| 224-509 | Lake In The Hills | Landline | Mcimetro Access Transmission Services |
| 224-510 | Schaumburg | Landline | Teleport Communications America |
| 224-512 | Barrington | Landline | Illinois Bell Tel |
| 224-513 | Libertyville | Landline | Global Crossing Local Services |
| 224-515 | Deerfield | Wireless | New Cingular Wireless |
| 224-516 | Lake Forest | Wireless | T-Mobile |
| 224-517 | Barrington | Wireless | T-Mobile |
| 224-518 | Arlington Heights | Wireless | T-Mobile |
| 224-520 | Schaumburg | Wireless | New Cingular Wireless |
| 224-521 | Glenview | Landline | Illinois Bell Tel |
| 224-522 | Northbrook | Wireless | T-Mobile |
| 224-523 | Elgin | Wireless | T-Mobile |
| 224-526 | Arlington Heights | Landline | Ton80 Communications |
| 224-529 | Glenview | Wireless | T-Mobile |
| 224-530 | Elgin | Landline | Comcast Phone Of Illinois |
| 224-531 | Des Plaines | Wireless | Verizon |
| 224-532 | Wheeling | Wireless | New Cingular Wireless |
| 224-533 | Deerfield | Landline | First Communications |
| 224-534 | Chicago | Landline | Paetec Communications |
| 224-535 | Elgin | Landline | AT&T |
| 224-538 | Waukegan | Wireless | Sprint Spectrum |
| 224-539 | Palatine | Landline | Teleport Communications America |
| 224-540 | Round Lake | Wireless | T-Mobile |
| 224-541 | Grayslake | Landline | Illinois Bell Tel |
| 224-542 | Wheeling | Landline | Illinois Bell Tel |
| 224-543 | Lincolnshire | Landline | Level 3 Communications |
| 224-544 | Lake Forest | Landline | Illinois Bell Tel |
| 224-545 | Northbrook | Wireless | Verizon |
| 224-548 | Northbrook | Wireless | Sprint Spectrum |
| 224-550 | Chicago | Landline | Radiantiq |
| 224-551 | Deerfield | Wireless | New Cingular Wireless |
| 224-552 | Lake Forest | Landline | Illinois Bell Tel |
| 224-554 | Schaumburg | Landline | Teleport Communications America |
| 224-558 | Rolling Meadows | Wireless | Sprint Spectrum |
| 224-563 | Des Plaines | Wireless | Verizon |
| 224-565 | Northbrook | Wireless | Sprint Spectrum |
| 224-566 | Lake In The Hills | Landline | Fractel |
| 224-567 | Mount Prospect | Wireless | Verizon |
| 224-568 | Round Lake | Landline | Mcimetro Access Transmission Services |
| 224-569 | Huntley | Landline | Illinois Bell Tel |
| 224-570 | Waukegan | Landline | Telnyx |
| 224-571 | Northbrook | Wireless | Verizon |
| 224-572 | Waukegan | Landline | Illinois Bell Tel |
| 224-575 | Elgin | Wireless | Verizon |
| 224-577 | Round Lake | Landline | Sprint Spectrum |
| 224-578 | Palatine | Wireless | T-Mobile |
| 224-580 | Des Plaines | Wireless | Verizon |
| 224-585 | Park Ridge | Landline | Level 3 Communications |
| 224-587 | Arlington Heights | Wireless | Sprint Spectrum |
| 224-588 | Wheeling | Wireless | Sprint Spectrum |
| 224-592 | Skokie | Landline | Illinois Bell Tel |
| 224-595 | Rolling Meadows | Wireless | T-Mobile |
| 224-599 | Barrington | Landline | Fractel |
| 224-600 | Lake In The Hills | Wireless | T-Mobile |
| 224-601 | Skokie | Landline | Illinois Bell Tel |
| 224-602 | Vernon Hills | Wireless | New Cingular Wireless |
| 224-603 | Antioch | Landline | Level 3 Communications |
| 224-605 | Elgin | Wireless | T-Mobile |
| 224-607 | Arlington Heights | Wireless | T-Mobile |
| 224-610 | Waukegan | Landline | Comcast Phone Of Illinois |
| 224-612 | Des Plaines | Wireless | Verizon |
| 224-616 | Glenview | Wireless | T-Mobile |
| 224-619 | Deerfield | Wireless | T-Mobile |
| 224-622 | Palatine | Wireless | T-Mobile |
| 224-623 | Lake In The Hills | Wireless | T-Mobile |
| 224-625 | Arlington Heights | Landline | Illinois Bell Tel |
| 224-627 | Waukegan | Wireless | Sprint Spectrum |
| 224-628 | Northbrook | Wireless | T-Mobile |
| 224-629 | South Elgin | Wireless | Sprint Spectrum |
| 224-632 | Deerfield | Landline | Illinois Bell Tel |
| 224-633 | Barrington | Landline | Level 3 Communications |
| 224-634 | Barrington | Wireless | New Cingular Wireless |
| 224-635 | Oak Brook | Landline | Ymax Communications |
| 224-636 | Northbrook | Wireless | Sprint Spectrum |
| 224-637 | Waukegan | Wireless | Sprint Spectrum |
| 224-639 | Northbrook | Landline | Fusion Communications |
| 224-643 | Lake Villa | Landline | Illinois Bell Tel |
| 224-645 | Arlington Heights | Wireless | Sprint Spectrum |
| 224-649 | Northbrook | Landline | Peerless Network Of Illinois |
| 224-650 | Huntley | Wireless | New Cingular Wireless |
| 224-651 | Des Plaines | Wireless | Verizon |
| 224-654 | Huntley | Landline | Illinois Bell Tel |
| 224-655 | Barrington | Landline | Level 3 Communications |
| 224-656 | Waukegan | Landline | Mcimetro Access Transmission Services |
| 224-659 | Schaumburg | Wireless | T-Mobile |
| 224-661 | Glenview | Landline | Bandwidth.com |
| 224-662 | Lake Zurich | Landline | Bandwidth.com |
| 224-665 | Waukegan | Landline | Illinois Bell Tel |
| 224-666 | Arlington Heights | Landline | Terra Nova Telecom Inc. |
| 224-667 | Waukegan | Landline | Illinois Bell Tel |
| 224-668 | Waukegan | Landline | Illinois Bell Tel |
| 224-676 | Wheeling | Landline | Comcast Phone Of Illinois |
| 224-677 | Lake Zurich | Wireless | Level 3 Communications |
| 224-678 | Lake In The Hills | Landline | Level 3 Communications |
| 224-688 | Northbrook | Wireless | Verizon |
| 224-689 | Elgin | Landline | Fractel |
| 224-698 | Roselle | Landline | Illinois Bell Tel |
| 224-699 | Dundee | Landline | Level 3 Communications |
| 224-701 | Lake Villa | Landline | Bandwidth.com |
| 224-702 | Zion | Landline | Bandwidth.com |
| 224-703 | Lake In The Hills | Wireless | New Cingular Wireless |
| 224-704 | Lake In The Hills | Landline | Bandwidth.com |
| 224-706 | Lake Forest | Landline | Bandwidth.com |
| 224-707 | Highland Park | Landline | Bandwidth.com |
| 224-713 | Lake In The Hills | Wireless | T-Mobile |
| 224-714 | Evanston | Landline | Comcast Phone Of Illinois |
| 224-715 | Vernon Hills | Wireless | T-Mobile |
| 224-716 | Lake In The Hills | Wireless | T-Mobile |
| 224-717 | Zion | Wireless | T-Mobile |
| 224-722 | Mount Prospect | Landline | Fractel |
| 224-723 | Palatine | Wireless | Verizon |
| 224-724 | Skokie | Landline | Teleport Communications America |
| 224-725 | Des Plaines | Wireless | Verizon |
| 224-727 | Deerfield | Wireless | T-Mobile |
| 224-730 | Zion | Wireless | T-Mobile |
| 224-732 | Wauconda | Landline | CenturyLink Communications |
| 224-733 | Waukegan | Wireless | Sprint Spectrum |
| 224-735 | Arlington Heights | Landline | AT&T |
| 224-737 | Lincolnshire | Landline | Mcimetro Access Transmission Services |
| 224-744 | Chicago | Landline | Fractel |
| 224-747 | Hampshire | Landline | Onvoy |
| 224-754 | Highland Park | Wireless | Verizon |
| 224-757 | Round Lake | Landline | Comcast Phone Of Illinois |
| 224-758 | Mount Prospect | Landline | Fractel |
| 224-760 | Elgin | Wireless | Verizon |
| 224-762 | Elgin | Wireless | T-Mobile |
| 224-763 | Northbrook | Wireless | New Cingular Wireless |
| 224-764 | Arlington Heights | Landline | Sigecom |
| 224-765 | Highland Park | Landline | Illinois Bell Tel |
| 224-766 | Morton Grove | Wireless | T-Mobile |
| 224-769 | Elgin | Wireless | Verizon |
| 224-770 | Palatine | Wireless | T-Mobile |
| 224-772 | Waukegan | Landline | Illinois Bell Tel |
| 224-774 | Zion | Wireless | T-Mobile |
| 224-775 | Des Plaines | Wireless | Verizon |
| 224-777 | Hampshire | Landline | Choice One Comm Il |
| 224-778 | Mundelein | Landline | Level 3 Communications |
| 224-781 | River Grove | Landline | Paetec Communications |
| 224-783 | Elgin | Landline | Illinois Bell Tel |
| 224-786 | Highland Park | Landline | Fractel |
| 224-788 | Antioch | Landline | Level 3 Communications |
| 224-789 | Zion | Wireless | T-Mobile |
| 224-795 | Arlington Heights | Wireless | Sprint Spectrum |
| 224-799 | Northbrook | Landline | Fractel |
| 224-800 | Arlington Heights | Wireless | Sprint Spectrum |
| 224-801 | Palatine | Landline | CenturyLink Communications |
| 224-802 | Dundee | Landline | CenturyLink Communications |
| 224-803 | Northbrook | Landline | Sprint Spectrum |
| 224-804 | Deerfield | Landline | Bandwidth.com |
| 224-805 | Rolling Meadows | Wireless | T-Mobile |
| 224-806 | Elgin | Wireless | T-Mobile |
| 224-808 | Northbrook | Wireless | New Cingular Wireless |
| 224-813 | Deerfield | Landline | CenturyLink Communications |
| 224-814 | Round Lake | Wireless | T-Mobile |
| 224-817 | Lake In The Hills | Wireless | T-Mobile |
| 224-818 | Round Lake | Wireless | T-Mobile |
| 224-822 | Arlington Heights | Landline | Fractel |
| 224-828 | Elgin | Wireless | Verizon |
| 224-829 | Lake In The Hills | Wireless | New Cingular Wireless |
| 224-830 | Arlington Heights | Wireless | T-Mobile |
| 224-836 | Palatine | Landline | Illinois Bell Tel |
| 224-840 | Elgin | Landline | Radiantiq |
| 224-842 | Libertyville | Landline | Fractel |
| 224-848 | Palatine | Wireless | T-Mobile |
| 224-855 | Arlington Heights | Wireless | New Cingular Wireless |
| 224-856 | Elgin | Landline | T-Mobile |
| 224-857 | Arlington Heights | Wireless | New Cingular Wireless |
| 224-858 | Huntley | Landline | AT&T |
| 224-864 | Vernon Hills | Landline | Peerless Network Of Illinois |
| 224-875 | Schaumburg | Wireless | T-Mobile |
| 224-877 | Mount Prospect | Landline | Onvoy |
| 224-880 | Lake Forest | Landline | Illinois Bell Tel |
| 224-888 | Cary | Landline | Level 3 Communications |
| 224-899 | Wheeling | Landline | Fractel |
| 224-900 | Wheeling | Wireless | New Cingular Wireless |
| 224-901 | Fox Lake | Landline | Peerless Network Of Illinois |
| 224-904 | Northbrook | Wireless | New Cingular Wireless |
| 224-908 | Fox Lake | Landline | Comcast Phone Of Illinois |
| 224-922 | Winnetka | Landline | Fractel |
| 224-927 | Northbrook | Landline | First Communications |
| 224-931 | Vernon Hills | Wireless | New Cingular Wireless |
| 224-933 | Round Lake | Landline | Fractel |
| 224-935 | Skokie | Wireless | Verizon |
| 224-938 | Des Plaines | Wireless | Verizon |
| 224-940 | Deerfield | Landline | Mcimetro Access Transmission Services |
| 224-944 | Waukegan | Wireless | Sprint Spectrum |
| 224-946 | Waukegan | Landline | Fractel |
| 224-948 | Deerfield | Landline | Mcimetro Access Transmission Services |
| 224-955 | Schaumburg | Landline | Fractel |
| 224-966 | Fox Lake | Landline | Fractel |
| 224-970 | Hanover Park | Landline | Bandwidth.com |
| 224-977 | Northbrook | Landline | Fractel |
| 224-985 | Park Ridge | Landline | Comcast Phone Of Illinois |
| 224-990 | Elgin | Landline | Paetec Communications |
| 224-993 | Wauconda | Landline | Level 3 Communications |
| 224-998 | Chicago | Landline | Teleport Communications America |
| 224-999 | Evanston | Landline | Level 3 Communications |