331 Area Code

Area code 331 generally covers Montgomery, Naperville, and Woodridge in the U.S. State of Illinois.

Top cities in area code 331

City Prefixes
Montgomery, IL18.9%
Naperville, IL15.5%
Woodridge, IL9.5%
Saint Charles, IL8.1%
Elmhurst, IL6.1%
Lombard, IL6.1%
West Chicago, IL4.1%
Lemont, IL4.1%
Oswego, IL4.1%
Hanover Park, IL3.4%

Top telephone carriers in area code 331

Carrier Prefixes
T-Mobile16.9%
Verizon14.2%
New Cingular Wireless12.8%
Fractel11.5%
Onvoy8.1%
Sprint Spectrum7.4%
Bandwidth.com5.4%
Level 3 Communications3.4%
Comcast Phone Of Illinois2.7%
Teleport Communications America2.7%

Area code 331 has 148 prefixes

Prefix Primary City Usage
331-200Hanover ParkWireless
331-201WoodridgeWireless
331-202ElmhurstWireless
331-203MontgomeryWireless
331-204NapervilleLandline
331-205MontgomeryWireless
331-206MontgomeryWireless
331-207YorkvilleLandline
331-208MontgomeryWireless
331-209ElmhurstWireless
331-210Saint CharlesLandline
331-212MontgomeryLandline
331-213NapervilleWireless
331-214WoodridgeWireless
331-215NapervilleWireless
331-216OswegoWireless
331-218WheatonWireless
331-219MontgomeryLandline
331-220MontgomeryWireless
331-221ElmhurstLandline
331-222Saint CharlesWireless
331-223Saint CharlesWireless
331-225ElmhurstWireless
331-226NapervilleWireless
331-227Sugar GroveWireless
331-228Saint CharlesWireless
331-229NapervilleWireless
331-230MontgomeryWireless
331-231Oak BrookWireless
331-232West ChicagoWireless
331-233WoodridgeLandline
331-234Sugar GroveWireless
331-235Saint CharlesWireless
331-236WheatonWireless
331-237NapervilleLandline
331-238WoodridgeLandline
331-239YorkvilleLandline
331-240West ChicagoLandline
331-241LombardLandline
331-242LombardWireless
331-243LombardWireless
331-244NapervilleLandline
331-245Hanover ParkWireless
331-246LemontWireless
331-247NapervilleLandline
331-248GenevaLandline
331-249NapervilleLandline
331-250MontgomeryWireless
331-251WoodridgeWireless
331-252WarrenvilleLandline
331-253LemontWireless
331-254Sugar GroveWireless
331-255MontgomeryLandline
331-256MontgomeryWireless
331-257NapervilleWireless
331-260WoodridgeLandline
331-261LemontWireless
331-262MontgomeryWireless
331-263BensenvilleLandline
331-264Oak BrookLandline
331-266Saint CharlesWireless
331-267LombardLandline
331-271Oak BrookLandline
331-276Saint CharlesWireless
331-281NapervilleLandline
331-299Oak BrookLandline
331-300MontgomeryWireless
331-301MontgomeryLandline
331-302MontgomeryWireless
331-304Hanover ParkWireless
331-305NapervilleWireless
331-307LombardWireless
331-308Hanover ParkLandline
331-310Big RockLandline
331-315LombardWireless
331-318LemontLandline
331-321MontgomeryWireless
331-330OswegoLandline
331-332NapervilleWireless
331-333NapervilleWireless
331-336MontgomeryLandline
331-345NapervilleLandline
331-348ElburnLandline
331-356Hanover ParkLandline
331-385MontgomeryWireless
331-388Sugar GroveLandline
331-399WoodridgeLandline
331-400OswegoLandline
331-401NapervilleLandline
331-422Saint CharlesLandline
331-425MontgomeryWireless
331-431MontgomeryWireless
331-442Saint CharlesWireless
331-444NapervilleLandline
331-452MontgomeryWireless
331-454MontgomeryWireless
331-456RoselleLandline
331-457NapervilleWireless
331-462LombardLandline
331-465West ChicagoWireless
331-472NapervilleWireless
331-481WoodridgeWireless
331-500GenevaLandline
331-529NapervilleLandline
331-551LombardWireless
331-575MontgomeryWireless
331-588Saint CharlesWireless
331-600WheatonLandline
331-625WoodridgeWireless
331-642ElmhurstWireless
331-643MontgomeryWireless
331-645ElmhurstWireless
331-666MontgomeryLandline
331-684MontgomeryLandline
331-701NapervilleWireless
331-702NapervilleLandline
331-703West ChicagoWireless
331-704Sugar GroveLandline
331-707MontgomeryWireless
331-716WheatonLandline
331-717OswegoWireless
331-725OswegoLandline
331-732GenevaLandline
331-757LemontWireless
331-771Saint CharlesLandline
331-775WoodridgeLandline
331-777WoodridgeLandline
331-788GenevaLandline
331-800West ChicagoLandline
331-801WoodridgeLandline
331-803LemontLandline
331-806WheatonLandline
331-808PlanoLandline
331-814NapervilleWireless
331-825Kane
331-826ElmhurstWireless
331-867YorkvilleLandline
331-871West ChicagoLandline
331-888WarrenvilleLandline
331-899LombardLandline
331-900ElmhurstLandline
331-901Saint CharlesLandline
331-903WoodridgeLandline
331-946Glen EllynLandline
331-979ElmhurstLandline
331-980MontgomeryWireless
331-998WoodridgeWireless
331-999OswegoLandline