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: 207

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-207 A Tucson AZ TCSNAZMAXCY  318J COMCAST IP PHONE, LLC 668      
520-207 0 Tucson AZ   318J COMCAST IP PHONE, LLC 668   2003-03-13   
520-207 1 Tucson AZ   318J COMCAST IP PHONE, LLC 668      
520-207 2 Tucson AZ   318J COMCAST IP PHONE, LLC 668   2003-03-13   
520-207 3 Tucson AZ   318J COMCAST IP PHONE, LLC 668   2004-02-04   
520-207 4 Tucson AZ   318J COMCAST IP PHONE, LLC 668   2003-08-07   
520-207 5 Tucson AZ   318J COMCAST IP PHONE, LLC 668   2003-08-13   
520-207 6 Tucson AZ   318J COMCAST IP PHONE, LLC 668   2003-08-07   
520-207 7 Tucson AZ   318J COMCAST IP PHONE, LLC 668      
520-207 8 Tucson AZ   318J COMCAST IP PHONE, LLC 668   2004-02-04   
520-207 9 Tucson AZ   318J COMCAST IP PHONE, LLC 668   2004-10-27   

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

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.