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: 729

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
712-729 A Sanborn IA SNBRIAXO1MD  1259 NORTHERN IOWA TEL. CO. 630      

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

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