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: SHRRILXDDS0

Remotes:

Switch Switch name Switch type
ANDVILXDRS0  ANDOVER  1RE 
MTVLILXDRS0  MATHERVILLE  1RE 
PRMPILXDRS0  PREEMPTION  1RE 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
309-593 A Sherrard IL 1183 CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL 634      

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

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