Area Code — 657

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Rate centers: WESTMINSTR, ANAHEIM, HUNTITNBCH, SANTA ANA, GARDEN GRV, CYPRESS, PLACENTIA, FULLERTON, ORANGE

Companies: METROPCS NETWORKS, LLC, BANDWIDTH.COM CLEC, LLC, ALLEGIANCE TELECOM, INC., CBEYOND COMMUNICATIONS, LLC, U.S. TELEPACIFIC CORP., LEVEL 3 COMMUNICATIONS, LLC, COX CALIFORNIA TELCOM, INC., YMAX COMMUNICATIONS CORP., TELCENTRIS COMMUNICATIONS, LLC, PEERLESS NETWORK OF CALIFORNIA, LLC, T-MOBILE USA, INC., XO CALIFORNIA, INC., NEW CINGULAR WIRELESS PCS, LLC, CELLCO PARTNERSHIP DBA VERIZON WIRELESS, SPRINT COMMUNICATIONS COMPANY, L.P., MCI WORLDCOM COMMUNICATIONS, INC., CA, INFOTELECOM, LLC, SBC INTERNET SERVICES, INC., 360NETWORKS (USA) INC., PAETEC COMMUNICATIONS, INC., CF COMMUNICATIONS, LLC DBA TELEKENEX, DMR COMMUNICATIONS INC., NEXTEL COMMUNICATIONS, INC., PACIFIC BELL, TW TELECOM OF CALIFORNIA LP, CURATEL, LLC, MULTIPLE OCN LISTING, TELEPORT COMMUNICATIONS GROUP - LOS ANGELES, VERIZON CALIFORNIA INC. (GTE)

List of 657 Area-Code Phone Number Prefixes

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