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: 312

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
712-312 A Pierson IA SXCYIADT9MD  221F ONVOY, LLC - IA 630      
712-312 0 Pierson IA   073H TELNYX LLC 630   2020-05-29   
712-312 1 Pierson IA   221F ONVOY, LLC - IA 630   2021-03-08   
712-312 2 Pierson IA   221F ONVOY, LLC - IA 630   2018-10-26   
712-312 3 Pierson IA   221F ONVOY, LLC - IA 630   2019-07-25   
712-312 4 Pierson IA   221F ONVOY, LLC - IA 630   2019-07-25   
712-312 5 Pierson IA   221F ONVOY, LLC - IA 630   2021-03-08   
712-312 6 Pierson IA   508J CENTURYLINK COMMUNICATIONS, LLC 630   2019-05-24   
712-312 7 Pierson IA   221F ONVOY, LLC - IA 630   2020-10-02   
712-312 8 Pierson IA   221F ONVOY, LLC - IA 630   2020-10-02   
712-312 9 Pierson IA   205H WESTERN IOWA TELEPHONE ASSOCIATION - IA 630   2022-08-11   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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