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: 242

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
657-242 A Anaheim CA LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730      
657-242 0 Anaheim CA RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730      
657-242 1 Anaheim CA LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730      
657-242 2 Anaheim CA LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730      
657-242 3 Anaheim CA LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730      
657-242 4 Anaheim CA SHOKCA02IMD  7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730      
657-242 5 Anaheim CA RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730      
657-242 6 Anaheim CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730      
657-242 7 Anaheim CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730      
657-242 8 Anaheim CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730      
657-242 9 Anaheim CA ANHMCANG2MD  4733 PAETEC COMMUNICATIONS, INC. - CA 730      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.