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About 312 Area Code

Located in: Illinois

Major Cities: Northbrook, Wheeling, Roselle, La grange, Hinsdale

Major Carriers: , Sprint Spectrum, L.P., Metro PCS, Inc., T-Mobile USA, Inc. (form. Metro PCS, Inc.), AT&T Wireless, T-Mobile USA, Inc., Ameritech - PSTN, Teleport Communications America, LLC, First Communications, LLC, Comcast, Verizon Wireless, Access One, Inc., Ovation Communications, Inc., Bandwidth/RingCentral Messaging - Sybase365, Cricket Wireless - ATT - SVR, Rcn Telecom Services, Inc., XO Communications, Inc., Zipwhip Messaging, Bandwidth/13 - Bandwidth.com - SVR, Level 3 Communications, LLC, Enflick - Neutral Tandem - SVR, TextNow - Neutral Tandem - SVR, Jasper Wireless, Airus, Inc., Onvoy, LLC, Exiant Communications LLC, Skype Communications SARL - Level3 - SVR, Vail Lab - Sybase365, Vail Lab, Peerless Network, T-Mobile, Pinger - Bandwidth.com - Sybase365, Paetec Communications, Inc., Bandwidth.com CLEC, LLC, Bandwidth SMSEnabled - Bandwidth CLEC - Sybase365, Google (Grand Central) BWI - Bandwidth.com - SVR, Bandwidth/15 - Bandwidth.com - SVR, Choice One Communications, Inc., Brightlink Communications, LLC (fka 365 Wireless, LLC), Twilio US1 - Level3 - SMS-Sybase365/MMS-SVR, Vonage Network Inc., Vonage Essentials - Sybase365, Vonage/Nexmo - Sybase365, AT&T - PSTN, MCI Metro, ATS, Inc., Ameritech, MCImetro Access Transmission Services LLC, Twilio - Inteliquent - SMS-Sybase365/MMS-SVR, American Messaging Services - Sybase365, Onvoy/5 - Sybase365

Prefixes in Area Code 312

312-209NORTHBROOK

312-215WHEELING

312-231ROSELLE

312-246WHEELING

312-295LA GRANGE

312-301HINSDALE

312-303WHEELING

312-304HINSDALE

312-305NORTHBROOK

312-310NORTHBROOK

312-314HINSDALE

312-317WHEELING

312-318LA GRANGE

312-331WHEELING

312-352HINSDALE

312-354ROSELLE

312-367LA GRANGE

312-403LA GRANGE

312-406WHEELING

312-412WHEELING

312-501LA GRANGE

312-510HINSDALE

312-518WHEELING

312-524WHEELING

312-531HINSDALE

312-615WHEELING

312-699HINSDALE

312-717LA GRANGE

312-749HINSDALE

312-816HINSDALE

312-844HINSDALE

312-865WHEELING

312-968LA GRANGE

312-969LA GRANGE

312-990HINSDALE

312-991WHEELING