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.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 712 [Rate centres in NPA 712] [Dial plan for NPA 712]

NXX: 227

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
712-227 A Crescent IA OMAHNENWXGY  318J COMCAST IP PHONE, LLC 644      
712-227 0 Crescent IA   318J COMCAST IP PHONE, LLC 644      
712-227 1 Crescent IA   985E BANDWIDTH.COM CLEC, LLC - IA 644   2012-07-08   
712-227 2 Crescent IA   221F ONVOY, LLC - IA 644   2013-09-13   
712-227 3 Crescent IA   985E BANDWIDTH.COM CLEC, LLC - IA 644   2014-10-06   
712-227 4 Crescent IA   985E BANDWIDTH.COM CLEC, LLC - IA 644   2015-01-18   
712-227 5 Crescent IA   221F ONVOY, LLC - IA 644   2016-04-11   
712-227 6 Crescent IA   221F ONVOY, LLC - IA 644   2016-04-11   
712-227 7 Crescent IA   221F ONVOY, LLC - IA 644   2013-04-04   
712-227 8 Crescent IA   508J CENTURYLINK COMMUNICATIONS, LLC 644   2015-01-22   
712-227 9 Crescent IA   073H TELNYX LLC 644   2018-07-02   

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

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.