Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 657 [Rate centres in NPA 657] [Dial plan for NPA 657]

NXX: 201

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
657-201 A Anaheim CA TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730      
657-201 0 Anaheim CA TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730   2008-11-27   
657-201 1 Anaheim CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2009-07-22   
657-201 2 Anaheim CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2025-01-08   
657-201 3 Anaheim CA SHOKCA022MD  576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2012-06-08   
657-201 4 Anaheim CA LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2012-12-02   
657-201 5 Anaheim CA LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2011-05-28   
657-201 6 Anaheim CA TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730   2018-11-04   
657-201 7 Anaheim CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2009-11-21   
657-201 8 Anaheim CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2011-02-06   
657-201 9 Anaheim CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2009-11-21   

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.