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.

Switch: DNVRCOMA21Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
720-676 6 Denver CO 156J RCLEC, INC. 656   2017-09-11   
720-693 7 Denver CO 156J RCLEC, INC. 656   2017-03-02   
720-930 A Denver CO 156J RCLEC, INC. 656      
720-930 4 Denver CO 156J RCLEC, INC. 656   2015-10-26   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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