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: 833

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
970-833 A Windsor CO DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
970-833 0 Windsor CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2014-06-19   
970-833 1 Windsor CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2014-12-08   
970-833 2 Windsor CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2016-03-21   
970-833 3 Windsor CO DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656   2014-01-31   
970-833 4 Windsor CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2016-03-21   
970-833 5 Windsor CO DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656   2015-04-03   
970-833 6 Windsor CO DNVRCO26XIX  073H TELNYX LLC 656   2017-06-23   
970-833 7 Windsor CO HLRNCOFP1MD  508J CENTURYLINK COMMUNICATIONS, LLC 656   2015-05-26   
970-833 8 Windsor CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2015-06-11   
970-833 9 Windsor CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2014-11-24   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.