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: AURSCOFWRS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
303-803 A Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
303-803 1 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
303-803 9 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
303-834 4 Longmont CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-225 1 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-225 2 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-225 3 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-225 4 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-225 5 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-225 6 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-278 A Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-278 2 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-279 6 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-305 A Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-305 0 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-475 8 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-754 A Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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