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: CETNWAXXRS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
509-636 A Creston WA 2408 CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 676      
509-636 2 Creston WA 2408 CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 676      

Last updated: Tue, 31 Mar 2026 13:56:49 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.