Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 657 [Rate centres in NPA 657] [Dial plan for NPA 657]

NXX: 720

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
657-720 A Santa Ana CA ANHMCA01XRY  318J COMCAST IP PHONE, LLC 730      
657-720 0 Santa Ana CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2024-10-16   
657-720 1 Santa Ana CA ANHMCA01XRY  318J COMCAST IP PHONE, LLC 730   2017-10-20   
657-720 2 Santa Ana CA ANHMCA01XRY  318J COMCAST IP PHONE, LLC 730   2017-09-22   
657-720 3 Santa Ana CA ANHMCA01XRY  318J COMCAST IP PHONE, LLC 730   2017-09-22   
657-720 4 Santa Ana CA ANHMCA01XRY  318J COMCAST IP PHONE, LLC 730   2017-09-22   
657-720 5 Santa Ana CA ANHMCA01XRY  318J COMCAST IP PHONE, LLC 730   2017-09-22   
657-720 6 Santa Ana CA ONTRCAFXDS0  7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 730   2017-10-30   
657-720 7 Santa Ana CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2017-09-23   
657-720 8 Santa Ana CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2017-09-23   
657-720 9 Santa Ana CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2017-09-23   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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