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: 860E INTERSTATE CABLEVISION COMPANY - IA

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
712-484 6 Carson IA OKLDIA070MD  644   2019-08-29   
712-492 A Oakland IA OKLDIA070MD  644      
712-492 9 Oakland IA OKLDIA070MD  644   2019-08-29   

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

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