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: 331

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
657-331 A Anaheim CA LSANCARCD3S  649C ONVOY, LLC - CA 730      
657-331 0 Anaheim CA RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730      
657-331 1 Anaheim CA RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730      
657-331 2 Anaheim CA   145J TERRA NOVA TELECOM INC. 730      
657-331 3 Anaheim CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730      
657-331 4 Anaheim CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730      
657-331 5 Anaheim CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730      
657-331 6 Anaheim CA LSANCARCD3S  649C ONVOY, LLC - CA 730      
657-331 7 Anaheim CA LSANCARCD3S  649C ONVOY, LLC - CA 730      
657-331 8 Anaheim CA LSANCARCD3S  649C ONVOY, LLC - CA 730      
657-331 9 Anaheim CA LSANCARCD3S  649C ONVOY, LLC - CA 730      

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.