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: 855

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
970-855 A Edwards CO DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656      
970-855 0 Edwards CO   318J COMCAST IP PHONE, LLC 656   2012-01-12   
970-855 1 Edwards CO   6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656   2021-01-14   
970-855 2 Edwards CO   318J COMCAST IP PHONE, LLC 656   2017-06-20   
970-855 3 Edwards CO   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656   2019-05-01   
970-855 5 Edwards CO   5972 INTERLINK ADV SVC DBA FORETHOUGHT.NET - CO 656   2017-04-09   
970-855 6 Edwards CO   026D ONVOY, LLC - CO 656   2020-12-04   
970-855 7 Edwards CO   508J CENTURYLINK COMMUNICATIONS, LLC 656   2014-11-05   
970-855 8 Edwards CO   026D ONVOY, LLC - CO 656   2021-03-07   
970-855 9 Edwards CO   7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656   2021-02-22   

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.