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: GRNLIAXCDS0

Remotes:

Switch Switch name Switch type
CHLSIAXORL0  CHELSEA  RLC 
LGRDIAXORS0  LE GRAND  RSC 
MLCMIAXORS3  MALCOM  RS 
MNTRIAXORS0  MONTOUR  RLC 
TOLDIAXORS0  TOLEDO  RSC 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
641-236 A Grinnell IA 1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 632      
641-269 A Grinnell IA 1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 632      

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

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