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: 820

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
712-820 A Council Bluffs IA OMAHNENWGT1  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 644   2025-10-12   
712-820 0 Council Bluffs IA   145J TERRA NOVA TELECOM INC. 644   2025-10-16   
712-820 6 Council Bluffs IA   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 644   2026-11-01   
712-820 7 Council Bluffs IA   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 644   2026-11-01   
712-820 8 Council Bluffs IA OMAHNENWGT1  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 644   2026-04-03   
712-820 9 Council Bluffs IA OMAHNENWGT1  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 644   2025-10-12   

Last updated: Sat, 10 Oct 2026 15:24:20 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.