Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 970 [Rate centres in NPA 970] [Dial plan for NPA 970]

NXX: 687

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
970-687 A Gypsum CO DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
970-687 0 Gypsum CO   7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656   2022-11-14   
970-687 1 Gypsum CO   318J COMCAST IP PHONE, LLC 656   2020-03-15   
970-687 3 Gypsum CO   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656   2019-05-01   
970-687 4 Gypsum CO   026D ONVOY, LLC - CO 656   2021-03-07   
970-687 5 Gypsum CO   026D ONVOY, LLC - CO 656   2021-03-07   
970-687 6 Gypsum CO   026D ONVOY, LLC - CO 656   2019-09-09   
970-687 7 Gypsum CO   026D ONVOY, LLC - CO 656   2019-09-09   
970-687 8 Gypsum CO   026D ONVOY, LLC - CO 656   2020-10-30   
970-687 9 Gypsum CO   145J TERRA NOVA TELECOM INC. 656   2025-05-15   

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

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