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: CRSPTXCSDS0

Remotes:

Switch Switch name Switch type
ASTNTXASRS0  ASHERTON  AXR 
BGWLTXBWRS0  BIG WELLS  AXR 
BTVLTXBVRS0  BATESVILLE  AXR 
CRCYTXCCRS0  CRYSTAL CITY  AXR 
CTRNTXCRRS0  CATARINA  AXR 
LAPRTXLPRS0  LAPRYOR  AXR 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
830-876 A Carrizo Springs TX 9533 SOUTHWESTERN BELL 566      

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

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