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: 673

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
925-673 A Clayton CA CYTNCA11DS0  9740 PACIFIC BELL 722      
925-673 0 Clayton CA CYTNCA11DS0  9740 PACIFIC BELL 722      
925-673 1 Clayton CA CYTNCA11DS0  9740 PACIFIC BELL 722      
925-673 2 Clayton CA CYTNCA11DS0  9740 PACIFIC BELL 722      
925-673 3 Clayton CA CYTNCA11DS0  9740 PACIFIC BELL 722      
925-673 4 Clayton CA SNFCCAMKX1X  9262 UTILITY TELECOM GROUP, LLC - CA 722      
925-673 5 Clayton CA CYTNCA11DS0  9740 PACIFIC BELL 722      
925-673 6 Clayton CA SNJUCACL8MD  145J TERRA NOVA TELECOM INC. 722      
925-673 7 Clayton CA CYTNCA11DS0  9740 PACIFIC BELL 722      
925-673 8 Clayton CA CYTNCA11DS0  9740 PACIFIC BELL 722      
925-673 9 Clayton CA CYTNCA11DS0  9740 PACIFIC BELL 722      

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.