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: 925 [Rate centres in NPA 925] [Dial plan for NPA 925]

NXX: 446

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
925-446 A Concord CA OKLDCA61DMD  6664 SPRINT SPECTRUM L.P. 722      
925-446 0 Concord CA CNCRCADOCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 722   2012-10-27   
925-446 1 Concord CA CNCRCADOCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 722   2012-10-27   
925-446 2 Concord CA OKLDCA61DMD  6664 SPRINT SPECTRUM L.P. 722   2012-11-25   
925-446 3 Concord CA HYWRCAMCDS0  7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722   2012-09-27   
925-446 4 Concord CA SNFCCA01XGX  516C AT&T CORP. 722   2013-08-06   
925-446 5 Concord CA OKLDCA61DMD  6664 SPRINT SPECTRUM L.P. 722   2012-11-25   
925-446 6 Concord CA SNFCCAMMDS0  485E ASTOUND BROADBAND, LLC - CA 722   2012-10-04   
925-446 7 Concord CA OKLDCA61DMD  6664 SPRINT SPECTRUM L.P. 722   2012-11-25   
925-446 8 Concord CA SNRTCAHFDS0  433E SONIC TELECOM, LLC - CA 722   2012-12-22   
925-446 9 Concord CA OKLDCA61DMD  6664 SPRINT SPECTRUM L.P. 722   2012-08-23   

Last updated: Tue, 04 May 2021 15:04:27 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.