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.

Crescent, IA

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
712-227 A OMAHNENWXGY  318J COMCAST IP PHONE, LLC 644      
712-227 0   318J COMCAST IP PHONE, LLC 644      
712-227 1   985E BANDWIDTH.COM CLEC, LLC - IA 644   2012-07-08   
712-227 2   221F ONVOY, LLC - IA 644   2013-09-13   
712-227 3   985E BANDWIDTH.COM CLEC, LLC - IA 644   2014-10-06   
712-227 4   985E BANDWIDTH.COM CLEC, LLC - IA 644   2015-01-18   
712-227 5   221F ONVOY, LLC - IA 644   2016-04-11   
712-227 6   221F ONVOY, LLC - IA 644   2016-04-11   
712-227 7   221F ONVOY, LLC - IA 644   2013-04-04   
712-227 8   508J CENTURYLINK COMMUNICATIONS, LLC 644   2015-01-22   
712-227 9   073H TELNYX LLC 644   2018-07-02   
712-401 A OMAHNENWXPX  221F ONVOY, LLC - IA 644      
712-401 0   221F ONVOY, LLC - IA 644   2021-04-23   
712-401 1   221F ONVOY, LLC - IA 644   2021-04-23   
712-401 2   221F ONVOY, LLC - IA 644   2021-05-10   
712-401 3   624H ONVOY SPECTRUM, LLC 644   2021-07-18   
712-401 4   624H ONVOY SPECTRUM, LLC 644   2021-10-29   
712-401 5   985E BANDWIDTH.COM CLEC, LLC - IA 644   2022-11-27   
712-401 7   221F ONVOY, LLC - IA 644   2019-10-25   
712-545 A CRSCIACORS1  9631 QWEST CORPORATION 644      
712-545 0   985E BANDWIDTH.COM CLEC, LLC - IA 644   2015-07-02   
712-545 1   318J COMCAST IP PHONE, LLC 644   2018-04-07   
712-545 2   423H AIRUS, INC - IA 644   2019-05-20   
712-545 3   9631 QWEST CORPORATION 644      
712-545 4   9631 QWEST CORPORATION 644      
712-545 5   221F ONVOY, LLC - IA 644   2015-12-04   
712-545 6   9877 LEVEL 3 COMMUNICATIONS, LLC - IA 644   2019-07-08   
712-545 7   221F ONVOY, LLC - IA 644   2008-09-04   
712-545 8   774B WALNUT TELEPHONE COMPANY, INC. - IA 644   2006-12-30   
712-545 9   9631 QWEST CORPORATION 644      

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.