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: 550

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
928-550 A Somerton AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666      
928-550 0 Somerton AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666      
928-550 1 Somerton AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666      
928-550 2 Somerton AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666      
928-550 3 Somerton AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666      
928-550 4 Somerton AZ PHNDAZ91DS5  3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 666      
928-550 5 Somerton AZ   793K TWC IP ENABLED SERVICES, LLC 666      
928-550 6 Somerton AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666      
928-550 7 Somerton AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666      
928-550 8 Somerton AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666      
928-550 9 Somerton AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.