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: 314

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
657-314 A Silverado CA LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730      
657-314 0 Silverado CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730      
657-314 1 Silverado CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730      
657-314 2 Silverado CA LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730      
657-314 3 Silverado CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730      
657-314 4 Silverado CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730      
657-314 5 Silverado CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730      
657-314 6 Silverado CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730      
657-314 7 Silverado CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730      
657-314 8 Silverado CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730      
657-314 9 Silverado CA ANHMCA01XRY  318J COMCAST IP PHONE, LLC 730      

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.