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: RPBLWAXADS0

Remotes:

Switch Switch name Switch type
CRLWWAXARS1  CURLEW  1RE 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
509-775 A Republic WA 4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 676      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.