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: 520 [Rate centres in NPA 520] [Dial plan for NPA 520]

NXX: 244

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-244 A Tucson AZ TCSMAZOI3MD  6529 T-MOBILE USA, INC. 668      
520-244 0 Tucson AZ TCSNAZMAXHX  630E ONVOY, LLC - AZ 668   2016-05-10   
520-244 1 Tucson AZ TCSNAZMAXHX  630E ONVOY, LLC - AZ 668   2016-05-10   
520-244 2 Tucson AZ TCSMAZOI3MD  6529 T-MOBILE USA, INC. 668   2016-08-07   
520-244 3 Tucson AZ TCSNAZMAXHX  630E ONVOY, LLC - AZ 668   2016-05-10   
520-244 4 Tucson AZ TCSMAZOI3MD  6529 T-MOBILE USA, INC. 668   2016-08-07   
520-244 5 Tucson AZ TCSMAZOI3MD  6529 T-MOBILE USA, INC. 668   2016-08-07   
520-244 6 Tucson AZ TCSMAZOI3MD  6529 T-MOBILE USA, INC. 668   2016-06-21   
520-244 7 Tucson AZ TCSMAZOI3MD  6529 T-MOBILE USA, INC. 668   2016-06-21   
520-244 8 Tucson AZ TCSMAZOI3MD  6529 T-MOBILE USA, INC. 668   2016-06-21   
520-244 9 Tucson AZ TCSMAZOI3MD  6529 T-MOBILE USA, INC. 668   2016-05-09   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.