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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OCN: 482J WEBSTER-CALHOUN TELEPHONE ASSOCIATION - IA

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
712-290 6 Rockwell City IA RCCYIA100MD  630   2021-05-10   
712-469 6 Manson IA RCCYIA100MD  630   2020-10-02   
712-565 A Lohrville IA RCCYIA100MD  630      
712-565 6 Lohrville IA RCCYIA100MD  630   2020-08-20   
712-640 A Lake City IA RCCYIA100MD  630      
712-640 6 Lake City IA RCCYIA100MD  630   2021-10-03   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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