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: 378

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
925-378 A Walnut Creek CA HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722      
925-378 0 Walnut Creek CA HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722      
925-378 1 Walnut Creek CA HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722      
925-378 2 Walnut Creek CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722      
925-378 3 Walnut Creek CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722      
925-378 4 Walnut Creek CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722      
925-378 5 Walnut Creek CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722      
925-378 6 Walnut Creek CA OKLDCAMP1MD  4733 PAETEC COMMUNICATIONS, INC. - CA 722      
925-378 7 Walnut Creek CA OKLDCA03XOY  318J COMCAST IP PHONE, LLC 722      
925-378 8 Walnut Creek CA OKLECAZVGT0  6529 T-MOBILE USA, INC. 722      
925-378 9 Walnut Creek CA OKLECAZVGT0  6529 T-MOBILE USA, INC. 722      

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.