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: SSVLCAXFDS0

Remotes:

Switch Switch name Switch type
EGLKCAXFRL0  EAGLE LAKE  RSC 
HRLNCAXFRS0  HERLONG  RSC 
JNVLCAXFRS0  JANESVILLE  RSC 
KEDDCAXFRS0  KEDDIE  RLC 
STNDCAAARS0  STANDISH  RSC 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
530-251 A Susanville CA 2308 CITIZENS TELECOM CA. DBA FRONTIER COM OF CA 724      
530-257 A Susanville CA 2308 CITIZENS TELECOM CA. DBA FRONTIER COM OF CA 724      

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

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