331 Area Code has 68 prefixes

PrefixPrimary CityCarrier
331-200ChicagoT-mobile Usa, Inc.
331-201ElginCellco Partnership Dba Verizon Wireless - Il
331-202Arlington HeightsSprint Spectrum L.p.
331-203Arlington HeightsSprint Spectrum L.p.
331-205Arlington HeightsT-mobile Usa, Inc.
331-206Arlington HeightsSprint Spectrum L.p.
331-207ChicagoLevel 3 Communications, Llc - Il
331-208Arlington HeightsSprint Spectrum L.p.
331-209ChicagoLevel 3 Communications, Llc - Il
331-210West ChicagoPeerless Network Of Illinois, Llc - Il
331-212Hickory HillsMci Worldcom Communications, Inc. - Il
331-213Hickory HillsCellco Partnership Dba Verizon Wireless - Il
331-214ElginCellco Partnership Dba Verizon Wireless - Il
331-215Hickory HillsCellco Partnership Dba Verizon Wireless - Il
331-216WillowbrookNew Cingular Wireless Pcs, Llc - Il
331-218ChicagoT-mobile Usa, Inc.
331-220Arlington HeightsSprint Spectrum L.p.
331-222West ChicagoNew Cingular Wireless Pcs, Llc - Il
331-223ElginNew Cingular Wireless Pcs, Llc - Il
331-225Arlington HeightsSprint Spectrum L.p.
331-228ChicagoOvation Communications Of Illinois, Inc.
331-229Hickory HillsCellco Partnership Dba Verizon Wireless - Il
331-234ChicagoCellco Partnership Dba Verizon Wireless - Il
331-240ChicagoPeerless Network Of Illinois, Llc - Il
331-245ChicagoT-mobile Usa, Inc.
331-248ChicagoComcast Phone Of Illinois, Llc Dba Comco - Il
331-250ChicagoT-mobile Usa, Inc.
331-251ElginCellco Partnership Dba Verizon Wireless - Il
331-254ChicagoT-mobile Usa, Inc.
331-256ChicagoCellco Partnership Dba Verizon Wireless - Il
331-262West ChicagoSprint Spectrum L.p.
331-281NapervilleAmeritech Illinois
331-301ChicagoLocal Access Llc - Il
331-302Hickory HillsCellco Partnership Dba Verizon Wireless - Il
331-305Hickory HillsCellco Partnership Dba Verizon Wireless - Il
331-318ChicagoLocal Access Llc - Il
331-330Buffalo GroveNew Cingular Wireless Pcs, Llc - Il
331-332NapervilleNew Cingular Wireless Pcs, Llc - Il
331-333ChicagoNew Cingular Wireless Pcs, Llc - Il
331-422ChicagoLevel 3 Communications, Llc - Il
331-425ChicagoT-mobile Usa, Inc.
331-431ChicagoBandwidth.com Clec, Llc - Il
331-442ElginCellco Partnership Dba Verizon Wireless - Il
331-444Hickory HillsCellco Partnership Dba Verizon Wireless - Il
331-452Hickory HillsCellco Partnership Dba Verizon Wireless - Il
331-454West ChicagoNew Cingular Wireless Pcs, Llc - Il
331-456ChicagoFirst Communications Llc - Il
331-457Hickory HillsCellco Partnership Dba Verizon Wireless - Il
331-462Oak BrookXo Illinois, Inc.
331-465ChicagoNew Cingular Wireless Pcs, Llc - Il
331-472ChicagoT-mobile Usa, Inc.
331-481ElginCellco Partnership Dba Verizon Wireless - Il
331-551WillowbrookNew Cingular Wireless Pcs, Llc - Il
331-575West ChicagoSprint Spectrum L.p.
331-588West ChicagoNew Cingular Wireless Pcs, Llc - Il
331-625ElginCellco Partnership Dba Verizon Wireless - Il
331-642ChicagoBandwidth.com Clec, Llc - Il
331-643Arlington HeightsSprint Spectrum L.p.
331-645Arlington HeightsSprint Spectrum L.p.
331-684NapervilleSigecom, Llc Dba Wow Internet Cable And Phone
331-702Elk Grove VillageMci Worldcom Communications, Inc. - Il
331-725WillowbrookNew Cingular Wireless Pcs, Llc - Il
331-777ChicagoCellco Partnership Dba Verizon Wireless - Il
331-801Oak BrookTeleport Communications America, Llc - Il
331-803ChicagoPeerless Network Of Illinois, Llc - Il
331-826Arlington HeightsSprint Spectrum L.p.
331-903Buffalo GroveAt&t Corp.
331-999ChicagoBandwidth.com Clec, Llc - Il