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: STNWMB01DS1

Remotes:

Switch Switch name Switch type
INWDMB01RS1  INWOOD  RSC 
LNDRMB01RS1  LUNDAR  RSC 
MRQTMB01RS1  MARQUETTE  RSC 
STLRMB01RS1  ST LAURENT  RSC 
STMTMB01RS1  STONY MOUNTAIN  RSC 
TELNMB01RS1  TEULON  RSC 
WDLDMB01RS1  WOODLANDS  RSC 
WRRNMB01RS1  WARREN  RSC 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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