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.

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

NXX: 433

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
928-433 A Flagstaff AZ PHNZAZ87PS0  7175 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 666      
928-433 0 Flagstaff AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666   2012-12-17   
928-433 1 Flagstaff AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666   2012-12-17   
928-433 2 Flagstaff AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666   2012-05-18   
928-433 3 Flagstaff AZ PHNDAZ91DS5  3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 666   2012-06-21   
928-433 4 Flagstaff AZ PHNDAZ91DS5  3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 666   2012-11-10   
928-433 5 Flagstaff AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666   2012-12-17   
928-433 6 Flagstaff AZ PHNDAZ91DS5  3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 666   2011-11-19   
928-433 7 Flagstaff AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666   2011-01-19   
928-433 8 Flagstaff AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666   2012-12-17   
928-433 9 Flagstaff AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666   2018-09-04   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.