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: 661

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
970-661 A Bayfield CO DNVRCO26DS5  278F PEERLESS NETWORK OF COLORADO, LLC - CO 656      
970-661 0 Bayfield CO DNVRCO26DS5  278F PEERLESS NETWORK OF COLORADO, LLC - CO 656   2013-06-01   
970-661 1 Bayfield CO DNVRCO26DS5  278F PEERLESS NETWORK OF COLORADO, LLC - CO 656   2013-06-01   
970-661 2 Bayfield CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2015-11-07   
970-661 3 Bayfield CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2018-10-08   
970-661 4 Bayfield CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2020-09-10   
970-661 5 Bayfield CO FTCLCOMAAMD  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656   2021-08-11   
970-661 6 Bayfield CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2018-12-30   
970-661 7 Bayfield CO HLRNCOFP1MD  508J CENTURYLINK COMMUNICATIONS, LLC 656   2014-05-22   
970-661 8 Bayfield CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2018-12-30   
970-661 9 Bayfield CO DNVRCO26XIX  073H TELNYX LLC 656   2018-05-02   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.