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.

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
720-585 0 Denver CO 641H TDS BROADBAND SERVICE LLC 656   2025-11-03   
720-970 6 Longmont CO 641H TDS BROADBAND SERVICE LLC 656   2025-11-03   
970-303 8 Windsor CO 641H TDS BROADBAND SERVICE LLC 656   2025-11-03   
970-338 6 Eaton CO 641H TDS BROADBAND SERVICE LLC 656   2025-11-03   
970-480 6 Estes Park CO 641H TDS BROADBAND SERVICE LLC 656   2025-11-03   
970-721 6 Mead CO 641H TDS BROADBAND SERVICE LLC 656   2025-11-03   
970-894 8 Berthoud CO 641H TDS BROADBAND SERVICE LLC 656   2025-11-03   
970-908 9 Loveland CO 641H TDS BROADBAND SERVICE LLC 656   2025-11-03   
970-912 A Cortez CO 641H TDS BROADBAND SERVICE LLC 656      
970-912 1 Cortez CO 641H TDS BROADBAND SERVICE LLC 656   2025-11-03   
970-957 0 Johnstown-Milliken CO 641H TDS BROADBAND SERVICE LLC 656   2025-11-03   
970-971 A Fort Collins CO 641H TDS BROADBAND SERVICE LLC 656   2025-11-03   
970-971 2 Fort Collins CO 641H TDS BROADBAND SERVICE LLC 656   2025-11-03   

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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