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: WRRNMNXWDS0

Remotes:

Switch Switch name Switch type
ALVDMNXARS0  ALVARADO  DC1 
ARGYMNXBRS0  ARGYLE  DC1 
HLCKMNXHRS8  HALLOCK  DC1 
KNDYMNXARS0  KENNEDY  DC1 
OSLOMNXORS0  OSLO  DC1 
STPHMNXSRS4  STEPHEN  DC1 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
218-745 A Warren MN 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 636      

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

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