Local Calling Guide

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NPA: 928 [Rate centres in NPA 928] [Dial plan for NPA 928]

NXX: 440

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
928-440 A Flagstaff AZ   612K CSC VOICE, LLC 666      
928-440 0 Flagstaff AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666   2015-04-05   
928-440 1 Flagstaff AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666   2015-06-13   
928-440 2 Flagstaff AZ PHNDAZ91DS5  3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 666   2014-07-25   
928-440 3 Flagstaff AZ   612K CSC VOICE, LLC 666   2014-01-03   
928-440 4 Flagstaff AZ   612K CSC VOICE, LLC 666   2014-01-03   
928-440 5 Flagstaff AZ   612K CSC VOICE, LLC 666   2014-01-03   
928-440 6 Flagstaff AZ PHNDAZ91DS5  3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 666   2015-08-21   
928-440 7 Flagstaff AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666   2015-06-13   
928-440 8 Flagstaff AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666   2014-09-25   
928-440 9 Flagstaff AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666   2014-09-25   

Last updated: Tue, 16 Jun 2026 00:09:45 UTC

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