Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 712 [Rate centres in NPA 712] [Dial plan for NPA 712]

NXX: 812

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
712-812 A Sioux City IA   321J HD CARRIER LLC 630   2025-08-29   
712-812 7 Sioux City IA   321J HD CARRIER LLC 630   2025-08-29   
712-812 8 Sioux City IA   321J HD CARRIER LLC 630   2025-08-29   
712-812 9 Sioux City IA   321J HD CARRIER LLC 630   2025-08-29   

Last updated: Tue, 15 Jul 2025 18:46:49 UTC

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