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: 478

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
925-478 A Walnut Creek CA SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722      
925-478 0 Walnut Creek CA OKLECAZV1MD  5562 METROPCS, INC. 722   2007-03-22   
925-478 1 Walnut Creek CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2007-03-22   
925-478 2 Walnut Creek CA SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2010-05-13   
925-478 3 Walnut Creek CA SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2005-04-29   
925-478 4 Walnut Creek CA SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2003-01-11   
925-478 5 Walnut Creek CA SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2005-04-29   
925-478 6 Walnut Creek CA   6010 NEW CINGULAR WIRELESS PCS, LLC 722   2025-01-08   
925-478 7 Walnut Creek CA SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2006-08-10   
925-478 8 Walnut Creek CA SNFCCAMMDS0  485E ASTOUND BROADBAND, LLC - CA 722   2008-05-03   
925-478 9 Walnut Creek CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2007-06-10   

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.