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: LNRKILXADS0

Remotes:

Switch Switch name Switch type
CHWKILXARS0  CHADWICK  DC1 
COLTILXARS0  COLETA  DCL 
SHNNILXARS0  SHANNON  DC1 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
815-493 A Lanark IL 1183 CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL 364      

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

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