331 Area Code

Area Code 331 Map

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

Statistics for area code 331