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: WPHLMIXIDS1

Remotes:

Switch Switch name Switch type
LNNHMIQDRS1  LANSING  RS 
STJHMICJRS1  ST JOHNS  RS 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
989-587 A Westphalia MI 0735 WESTPHALIA TEL. CO. 344      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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