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: GRVGCO20DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
303-268 A Denver CO 7801 ICG TELECOM GROUP - CO 656      
303-325 A Denver CO 7801 ICG TELECOM GROUP - CO 656      
303-406 A Denver CO 7801 ICG TELECOM GROUP - CO 656      
303-409 A Denver CO 7801 ICG TELECOM GROUP - CO 656      
303-414 A Denver CO 7801 ICG TELECOM GROUP - CO 656      
303-483 A Denver CO 7801 ICG TELECOM GROUP - CO 656      
303-493 A Denver CO 7801 ICG TELECOM GROUP - CO 656      
303-865 A Denver CO 7801 ICG TELECOM GROUP - CO 656      
720-330 A Denver CO 7801 ICG TELECOM GROUP - CO 656      

Last updated: Sun, 10 Nov 2019 13:49:34 UTC

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