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.

Switch: OKLDCA03XKY

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
925-205 0 Danville CA 624H ONVOY SPECTRUM, LLC 722      
925-258 7 Orinda CA 624H ONVOY SPECTRUM, LLC 722      
925-307 3 Dublin-San Ramon CA 624H ONVOY SPECTRUM, LLC 722      
925-514 0 Martinez CA 624H ONVOY SPECTRUM, LLC 722      
925-520 9 Pleasanton CA 624H ONVOY SPECTRUM, LLC 722      
925-531 A Lafayette CA 624H ONVOY SPECTRUM, LLC 722   2024-01-27   
925-531 0 Lafayette CA 624H ONVOY SPECTRUM, LLC 722      
925-590 A Bishop Ranch CA 624H ONVOY SPECTRUM, LLC 722      
925-590 5 Bishop Ranch CA 624H ONVOY SPECTRUM, LLC 722      
925-690 8 Clayton CA 624H ONVOY SPECTRUM, LLC 722      
925-888 0 Moraga CA 624H ONVOY SPECTRUM, LLC 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.