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: 970 [Rate centres in NPA 970] [Dial plan for NPA 970]

NXX: 551

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
970-551 A Marvel CO GDJTCOMAKMD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
970-551 0 Marvel CO   6010 NEW CINGULAR WIRELESS PCS, LLC 656      
970-551 1 Marvel CO   6010 NEW CINGULAR WIRELESS PCS, LLC 656   2015-12-06   
970-551 2 Marvel CO   026D ONVOY, LLC - CO 656   2018-12-30   
970-551 3 Marvel CO   026D ONVOY, LLC - CO 656   2018-12-30   
970-551 5 Marvel CO   6010 NEW CINGULAR WIRELESS PCS, LLC 656   2018-12-24   
970-551 6 Marvel CO   078F BANDWIDTH.COM CLEC, LLC - CO 656   2020-04-09   
970-551 7 Marvel CO   508J CENTURYLINK COMMUNICATIONS, LLC 656   2014-11-06   
970-551 8 Marvel CO   026D ONVOY, LLC - CO 656   2021-01-30   
970-551 9 Marvel CO   026D ONVOY, LLC - CO 656   2021-03-12   

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.