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: 540

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
657-540 A Huntington Beach CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730      
657-540 0 Huntington Beach CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730      
657-540 1 Huntington Beach CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730      
657-540 2 Huntington Beach CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730      
657-540 3 Huntington Beach CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730      
657-540 4 Huntington Beach CA LNBHCAXPXAY  624H ONVOY SPECTRUM, LLC 730      
657-540 5 Huntington Beach CA LNBHCAXPXAY  624H ONVOY SPECTRUM, LLC 730      
657-540 6 Huntington Beach CA LNBHCAXPXAY  624H ONVOY SPECTRUM, LLC 730      
657-540 7 Huntington Beach CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730      
657-540 8 Huntington Beach CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730      
657-540 9 Huntington Beach CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730      

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.