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.
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Switch: KNLDCAXFDS0

Remotes:

Switch Switch name Switch type
RBNSCAXGRS1  ROBBINS  1RE 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
530-735 A Knights Landing CA 4420 FRONTIER CALIFORNIA INC. 726      
530-735 6 Knights Landing CA 4420 FRONTIER CALIFORNIA INC. 726      

Last updated: Sat, 15 Nov 2025 03:38:44 UTC

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