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: GRVLCAXF92E

Remotes:

Switch Switch name Switch type
ALPNCAXFRS2  ALDERPOINT  1RC 
LGGTCAXFRS4  LEGGETT  1RC 
MDRVCAXFRS3  MAD RIVER  1RC 
PIRCCAXFRS5  PIERCY  1RC 
WHTNCAXFRS1  WHITETHORN  1RC 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
707-923 A Garberville CA 4420 FRONTIER CALIFORNIA INC. 722      
707-923 1 Garberville CA 4420 FRONTIER CALIFORNIA INC. 722      
707-923 2 Garberville CA 4420 FRONTIER CALIFORNIA INC. 722      
707-923 3 Garberville CA 4420 FRONTIER CALIFORNIA INC. 722      
707-923 4 Garberville CA 4420 FRONTIER CALIFORNIA INC. 722      
707-923 7 Garberville CA 4420 FRONTIER CALIFORNIA INC. 722      
707-923 9 Garberville CA 4420 FRONTIER CALIFORNIA INC. 722      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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