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: CSRKCOFEGT2

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
303-319 A Denver CO 765B ELBERT COUNTY WIRELESS, LLC 656      
303-319 7 Denver CO 765B ELBERT COUNTY WIRELESS, LLC 656   2004-10-17   
720-375 A Denver CO 5736 COMMNET WIRELESS, LLC 656      
720-375 7 Denver CO 5736 COMMNET WIRELESS, LLC 656   2007-08-31   
720-509 0 Denver CO 5736 COMMNET WIRELESS, LLC 656   2010-06-02   
720-585 A Denver CO 5736 COMMNET WIRELESS, LLC 656      
720-585 0 Denver CO 5736 COMMNET WIRELESS, LLC 656   2012-12-17   
720-734 A Denver CO 5736 COMMNET WIRELESS, LLC 656      
720-734 0 Denver CO 5736 COMMNET WIRELESS, LLC 656   2020-07-02   
970-693 8 Meeker CO 5736 COMMNET WIRELESS, LLC 656   2017-12-06   

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

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