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: 220

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
712-220 A Carroll IA OMAHNENWXXX  593K MCC TELEPHONY LLC 644      
712-220 0 Carroll IA   985E BANDWIDTH.COM CLEC, LLC - IA 644   2013-12-21   
712-220 1 Carroll IA   593K MCC TELEPHONY LLC 644   2010-04-16   
712-220 2 Carroll IA   985E BANDWIDTH.COM CLEC, LLC - IA 644   2014-12-08   
712-220 3 Carroll IA   985E BANDWIDTH.COM CLEC, LLC - IA 644   2015-11-08   
712-220 4 Carroll IA   8344 TELEPORT COMMUNICATIONS AMERICA, LLC - IA 644   2016-02-12   
712-220 5 Carroll IA   221F ONVOY, LLC - IA 644   2016-02-26   
712-220 6 Carroll IA   221F ONVOY, LLC - IA 644   2016-02-26   
712-220 7 Carroll IA   221F ONVOY, LLC - IA 644   2016-04-06   
712-220 8 Carroll IA   221F ONVOY, LLC - IA 644   2016-04-06   
712-220 9 Carroll IA   423H AIRUS, INC - IA 644   2018-03-01   

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.