Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Switch: DNVRCOGVDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
720-867 A Denver CO 8540 GREAT WEST SERVICES, LTD. - CO 656      

Last updated: Fri, 25 Jul 2025 03:21:23 UTC

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