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.
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Switch: DNVRCOII3MD

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
720-999 6 Denver CO 6529 T-MOBILE USA, INC. 656   2008-10-25   
720-999 7 Denver CO 6529 T-MOBILE USA, INC. 656   2008-10-25   
720-999 8 Denver CO 6529 T-MOBILE USA, INC. 656   2008-10-25   
970-281 A Fraser CO 6529 T-MOBILE USA, INC. 656      
970-575 A Fraser CO 6529 T-MOBILE USA, INC. 656      
970-575 1 Fraser CO 6529 T-MOBILE USA, INC. 656      
970-575 4 Fraser CO 6529 T-MOBILE USA, INC. 656   2021-03-04   

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

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