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: DNVRCOMAGT7

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
720-345 A Denver CO 588A ZIPPYTECH INCORPORATED 656      
720-345 0 Denver CO 588A ZIPPYTECH INCORPORATED 656   2008-02-29   
970-542 8 Fort Morgan CO 588A ZIPPYTECH INCORPORATED 656   2011-04-10   
970-547 6 Breckenridge CO 588A ZIPPYTECH INCORPORATED 656   2014-03-27   
970-827 2 Vail CO 588A ZIPPYTECH INCORPORATED 656   2012-11-23   
970-888 5 Greeley CO 588A ZIPPYTECH INCORPORATED 656   2013-01-08   
970-968 5 Dillon CO 588A ZIPPYTECH INCORPORATED 656   2014-05-25   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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