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: BLDRCOMADS0

Remotes:

Switch Switch name Switch type
BLDRCOGBRS1  GUNBARREL  5ER 
NDLDCOMARS1  NEDERLAND  5ER 
WARDCOMARS1  WARD  5ER 

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
720-854 7 Denver CO 9636 QWEST CORPORATION 656      

<< 1 2

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

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