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: DNVTCOUZDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
720-709 4 Denver CO 4788 MCLEODUSA TELECOMMUNICATION SERVICES, INC. - CO 656   2014-10-23   
720-709 5 Denver CO 4788 MCLEODUSA TELECOMMUNICATION SERVICES, INC. - CO 656   2014-10-23   

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

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