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: 284

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
712-284 A Alta IA STLKIATCDS0  9631 QWEST CORPORATION 630      
712-284 0 Alta IA   751F MCC TELEPHONY OF IOWA, LLC - IA 630   2010-04-23   
712-284 1 Alta IA   9631 QWEST CORPORATION 630      
712-284 2 Alta IA   9631 QWEST CORPORATION 630      
712-284 3 Alta IA   444G AUREON COMMUNICATIONS, LLC 630   2021-09-26   
712-284 4 Alta IA   145J TERRA NOVA TELECOM INC. 630   2025-05-17   
712-284 5 Alta IA   9877 LEVEL 3 COMMUNICATIONS, LLC - IA 630   2022-12-10   
712-284 7 Alta IA   508J CENTURYLINK COMMUNICATIONS, LLC 630   2016-12-23   
712-284 8 Alta IA   515J IP HORIZON LLC 630   2025-10-03   
712-284 9 Alta IA   145J TERRA NOVA TELECOM INC. 630   2026-01-04   

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

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.