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: 403

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
712-403 A Sheldon IA SXCYIADT9MD  221F ONVOY, LLC - IA 630      
712-403 0 Sheldon IA SXCYIADTUMD  073H TELNYX LLC 630   2020-10-04   
712-403 1 Sheldon IA SXCYIADTCMD  6570 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 630   2022-11-28   
712-403 3 Sheldon IA SXCYIADT9MD  221F ONVOY, LLC - IA 630   2021-09-16   
712-403 6 Sheldon IA SXCYIADT9MD  221F ONVOY, LLC - IA 630   2021-04-14   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.