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: 589

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-589 A Tucson AZ TCSNAZMAVMD  3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 668      
520-589 0 Tucson AZ   6529 T-MOBILE USA, INC. 668   2015-09-20   
520-589 1 Tucson AZ   3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 668   2015-09-19   
520-589 2 Tucson AZ   3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 668   2015-09-19   
520-589 3 Tucson AZ   6529 T-MOBILE USA, INC. 668   2015-09-20   
520-589 4 Tucson AZ   6529 T-MOBILE USA, INC. 668   2015-09-20   
520-589 5 Tucson AZ   6529 T-MOBILE USA, INC. 668   2015-09-20   
520-589 6 Tucson AZ   6529 T-MOBILE USA, INC. 668   2015-09-20   
520-589 7 Tucson AZ   6529 T-MOBILE USA, INC. 668   2015-09-20   
520-589 8 Tucson AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 668   2015-10-15   
520-589 9 Tucson AZ   6529 T-MOBILE USA, INC. 668   2015-09-20   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.