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: 217

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
712-217 A Carter Lake IA OMAHNENWXPX  221F ONVOY, LLC - IA 644      
712-217 0 Carter Lake IA OMAHNENWXPX  221F ONVOY, LLC - IA 644   2021-04-23   
712-217 1 Carter Lake IA OMAHNENWXPX  221F ONVOY, LLC - IA 644   2020-01-26   
712-217 2 Carter Lake IA OMAHNENWXPX  221F ONVOY, LLC - IA 644   2019-10-25   
712-217 3 Carter Lake IA OMAHNENWXPX  221F ONVOY, LLC - IA 644   2019-10-25   
712-217 4 Carter Lake IA OMAHNENWX2Y  624H ONVOY SPECTRUM, LLC 644   2021-10-30   
712-217 5 Carter Lake IA OMAHNENWX2Y  624H ONVOY SPECTRUM, LLC 644   2021-07-18   
712-217 6 Carter Lake IA OMAHNENWXPX  221F ONVOY, LLC - IA 644   2021-11-17   
712-217 7 Carter Lake IA OMAHNENWXPX  221F ONVOY, LLC - IA 644   2021-10-18   
712-217 8 Carter Lake IA OMAHNENWXPX  221F ONVOY, LLC - IA 644   2021-04-23   
712-217 9 Carter Lake IA   423H AIRUS, INC - IA 644   2025-05-11   

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.