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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Alta, IA

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
712-200 A ALTAIA01RS0  3097 ALTA MUNICIPAL UTILITIES - IA 630      
712-284 A STLKIATCDS0  9631 QWEST CORPORATION 630      
712-284 0 SXCYIADTMMD  751F MCC TELEPHONY OF IOWA, LLC - IA 630   2010-04-23   
712-284 1 STLKIATCDS0  9631 QWEST CORPORATION 630      
712-284 2 STLKIATCDS0  9631 QWEST CORPORATION 630      
712-284 3 DESMIAITGT5  444G AUREON COMMUNICATIONS, LLC 630   2021-09-26   
712-284 5 SXCYIA78X1X  9877 LEVEL 3 COMMUNICATIONS, LLC - IA 630   2022-12-10   
712-284 7 SXCYIADTQMD  508J CENTURYLINK COMMUNICATIONS, LLC 630   2016-12-23   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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