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: 6570 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
712-925 0 Sioux City IA SXCYIADTCMD  630   2023-12-11   
712-936 8 Storm Lake IA SXCYIADTCMD  630   2026-03-09   
712-939 0 Villisca IA OMAHNENWXCY  644   2024-08-23   

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Last updated: Tue, 01 Sep 2026 00:40:05 UTC

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