Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 928 [Rate centres in NPA 928] [Dial plan for NPA 928]

NXX: 644

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
928-644 A Colorado City AZ SLKCUT26BMD  965H FRACTEL, LLC 660      
928-644 4 Colorado City AZ SLKCUT26BMD  965H FRACTEL, LLC 660   2020-11-29   
928-644 6 Colorado City AZ   145J TERRA NOVA TELECOM INC. 660   2025-07-14   

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

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