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: 707 [Rate centres in NPA 707] [Dial plan for NPA 707]

NXX: 657

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
707-657 A Windsor CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2024-01-21   
707-657 0 Windsor CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722      
707-657 1 Windsor CA OKLECAZV1MD  5562 METROPCS, INC. 722   2020-08-15   
707-657 2 Windsor CA   515J IP HORIZON LLC 722   2003-10-13   
707-657 3 Windsor CA HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2013-02-04   
707-657 4 Windsor CA SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2004-04-10   
707-657 5 Windsor CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2005-03-14   
707-657 6 Windsor CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2006-01-08   
707-657 7 Windsor CA HYWRCA115MD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 722   2007-04-15   
707-657 8 Windsor CA OKLECAZV1MD  5562 METROPCS, INC. 722   2010-11-08   
707-657 9 Windsor CA HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2013-08-06   

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.