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: LEONIAXODS0

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
641-873 A Allerton IA 1888 GRAND RIVER MUTUAL TEL CO 632      
641-876 A Lineville IA 1888 GRAND RIVER MUTUAL TEL CO 632      
641-897 A Millerton IA 1888 GRAND RIVER MUTUAL TEL CO 632      
660-735 A South Davis City MO 1888 GRAND RIVER MUTUAL TEL CO 632      
660-875 A South Lineville MO 1888 GRAND RIVER MUTUAL TEL CO 632      
660-878 A Andover MO 1888 GRAND RIVER MUTUAL TEL CO 632      

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Last updated: Tue, 31 Mar 2026 13:56:49 UTC

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