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: 951 [Rate centres in NPA 951] [Dial plan for NPA 951]

NXX: 977

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
951-977 A Arlington CA ONTRCAFXDS0  7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 730      
951-977 0 Arlington CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2007-04-15   
951-977 1 Arlington CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2008-11-23   
951-977 2 Arlington CA ONTRCAFXDS0  7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 730      
951-977 3 Arlington CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2008-11-23   
951-977 4 Arlington CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2008-07-30   
951-977 5 Arlington CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2008-06-16   
951-977 6 Arlington CA RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2018-02-16   
951-977 7 Arlington CA LSANCAJWJMD  516J TON80 COMMUNICATIONS, LLC 730   2022-05-10   
951-977 8 Arlington CA RVSDCAQUPS0  776C CHARTER FIBERLINK CA-CCO, LLC - CA 730   2006-04-29   
951-977 9 Arlington CA RVSDCAQUPS0  776C CHARTER FIBERLINK CA-CCO, LLC - CA 730   2007-03-16   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.