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: 503

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
970-503 A Greeley CO DNVRCOMA31Z  710A ALLO COMMUNICATIONS, LLC - NE 656      
970-503 0 Greeley CO   939H COMMIO, LLC 656   2021-08-28   
970-503 1 Greeley CO   939H COMMIO, LLC 656   2021-08-28   
970-503 2 Greeley CO   939H COMMIO, LLC 656   2021-08-28   
970-503 3 Greeley CO   6010 NEW CINGULAR WIRELESS PCS, LLC 656   2021-11-02   
970-503 4 Greeley CO   6010 NEW CINGULAR WIRELESS PCS, LLC 656   2021-09-09   
970-503 5 Greeley CO   710A ALLO COMMUNICATIONS, LLC - NE 656   2021-05-02   
970-503 6 Greeley CO   6010 NEW CINGULAR WIRELESS PCS, LLC 656   2021-09-09   
970-503 7 Greeley CO   939H COMMIO, LLC 656   2021-08-28   
970-503 8 Greeley CO   939H COMMIO, LLC 656   2021-08-28   
970-503 9 Greeley CO   6010 NEW CINGULAR WIRELESS PCS, LLC 656   2021-11-02   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.