About 331 Area Code
Located in: Illinois
Major Cities: Bartlett, Elmhurst, Aurora, Naperville, Yorkville, Oswego, Wheaton, Lombard, Lemont, Geneva, Itasca, Elburn, Big rock, Roselle, Kaneville, Plano
Major Carriers: , T-Mobile USA, Inc., T-Mobile, Broadvox-CLEC SMSEnabled - Sybase365, Bandwidth/15 - Bandwidth.com - SVR, Bandwidth SMSEnabled - Bandwidth CLEC - Sybase365, Google (Grand Central) BWI - Bandwidth.com - SVR, MCI Metro, ATS, Inc., Level 3 Communications, LLC, Onvoy/5 - Sybase365, Onvoy, LLC, Twilio - Inteliquent - SMS-Sybase365/MMS-SVR, Onvoy/3 - Sybase365, TextPlus - 360 Networks - SVR, SMS Hyperloop - Onvoy - SVR, Neutral Tandem, Peerless Network, unknown, Cricket Wireless - ATT - SVR, Verizon Wireless, AT&T Wireless, Bandwidth.com CLEC, LLC, Sprint Spectrum, L.P., Zipwhip Messaging, Metro PCS, Inc., Telnyx - Telnyx - SVR, Telnyx LLC, Local Access LLC, Exiant Communications LLC, Bandwidth/RingCentral Messaging - Sybase365, Vonage Retail - Vonage Network - Sybase365, TextNow - Bandwidth.com - SVR, Google, Enflick - Bandwidth.com - SVR, Brightlink Communications, LLC (fka 365 Wireless, LLC), Twilio - Peerless - SMS-Sybase365/MMS-SVR, TextNow - 360 Networks - SVR, CenturyLink, Twilio, Vail Lab - Sybase365, Twilio US1 - Level3 - SMS-Sybase365/MMS-SVR, Remind - SMS-Sybase365/MMS-SVR, GoTextMe - SMS-Sybase365/MMS-SVR, Level3 SMSEnabled - Sybase365, MCImetro Access Transmission Services LLC, Remind P2P - SMS-Sybase365/MMS-SVR, Comcast, AT&T Mobility, Peerless Networks - Peerless Networks - SVR, Choice One Communications, Inc.
Prefixes in Area Code 331
331-200BARTLETT
331-202ELMHURST
331-203AURORA
331-204NAPERVILLE
331-205AURORA
331-206AURORA
331-207YORKVILLE
331-208AURORA
331-209ELMHURST
331-212AURORA
331-213NAPERVILLE
331-215NAPERVILLE
331-216OSWEGO
331-218WHEATON
331-219AURORA
331-220AURORA
331-221ELMHURST
331-225ELMHURST
331-226NAPERVILLE
331-229NAPERVILLE
331-230AURORA
331-231NAPERVILLE
331-236WHEATON
331-237NAPERVILLE
331-239YORKVILLE
331-241LOMBARD
331-242LOMBARD
331-243LOMBARD
331-244NAPERVILLE
331-245BARTLETT
331-246LEMONT
331-247NAPERVILLE
331-248GENEVA
331-249NAPERVILLE
331-250AURORA
331-253LEMONT
331-255AURORA
331-256AURORA
331-257AURORA
331-258AURORA
331-261LEMONT
331-262AURORA
331-263ITASCA
331-281NAPERVILLE
331-300AURORA
331-301AURORA
331-302AURORA
331-303ELBURN
331-304BARTLETT
331-305NAPERVILLE
331-307LOMBARD
331-308BARTLETT
331-310BIG ROCK
331-315LOMBARD
331-318LEMONT
331-321AURORA
331-330NAPERVILLE
331-332NAPERVILLE
331-333NAPERVILLE
331-336AURORA
331-348ELBURN
331-356BARTLETT
331-385AURORA
331-400OSWEGO
331-401NAPERVILLE
331-425AURORA
331-431AURORA
331-444NAPERVILLE
331-452AURORA
331-454AURORA
331-456ROSELLE
331-457NAPERVILLE
331-462LOMBARD
331-472NAPERVILLE
331-529NAPERVILLE
331-551LOMBARD
331-575AURORA
331-600WHEATON
331-642ELMHURST
331-643AURORA
331-645ELMHURST
331-666AURORA
331-684AURORA
331-701NAPERVILLE
331-702NAPERVILLE
331-704KANEVILLE
331-707AURORA
331-716WHEATON
331-717OSWEGO
331-725OSWEGO
331-732GENEVA
331-757LEMONT
331-803LEMONT
331-806WHEATON
331-808PLANO
331-814NAPERVILLE
331-825GENEVA
331-826ELMHURST
331-900ELMHURST
331-979ELMHURST
331-980AURORA
331-999OSWEGO