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: 351

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-351 A Tucson AZ TCSMAZSJAMD  7552 LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 668      
520-351 0 Tucson AZ TCSNAZMAXHX  630E ONVOY, LLC - AZ 668      
520-351 1 Tucson AZ TCSMAZCH1MD  6010 NEW CINGULAR WIRELESS PCS, LLC 668      
520-351 2 Tucson AZ TCSMAZCH1MD  6010 NEW CINGULAR WIRELESS PCS, LLC 668      
520-351 3 Tucson AZ TCSMAZSJAMD  7552 LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 668      
520-351 4 Tucson AZ TCSMAZSJAMD  7552 LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 668      
520-351 5 Tucson AZ TCSMAZSJAMD  7552 LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 668      
520-351 6 Tucson AZ TCSMAZSJAMD  7552 LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 668      
520-351 7 Tucson AZ TCSMAZSJAMD  7552 LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 668      
520-351 8 Tucson AZ TCSMAZSJAMD  7552 LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 668      
520-351 9 Tucson AZ TCSMAZOI3MD  6529 T-MOBILE USA, INC. 668      

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.