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: 220

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-220 A Sierra Vista AZ TCSMAZOI3MD  6529 T-MOBILE USA, INC. 668      
520-220 0 Sierra Vista AZ TCSMAZOI3MD  6529 T-MOBILE USA, INC. 668      
520-220 1 Sierra Vista AZ TCSMAZOI3MD  6529 T-MOBILE USA, INC. 668      
520-220 2 Sierra Vista AZ TCSMAZCH1MD  6010 NEW CINGULAR WIRELESS PCS, LLC 668      
520-220 3 Sierra Vista AZ TCSNAZXGAMD  6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 668      
520-220 4 Sierra Vista AZ TCSMAZOI3MD  6529 T-MOBILE USA, INC. 668      
520-220 5 Sierra Vista AZ TCSNAZMAXHX  630E ONVOY, LLC - AZ 668      
520-220 6 Sierra Vista AZ TCSMAZOI3MD  6529 T-MOBILE USA, INC. 668      
520-220 7 Sierra Vista AZ TCSMAZCH1MD  6010 NEW CINGULAR WIRELESS PCS, LLC 668      
520-220 8 Sierra Vista AZ TCSMAZOI3MD  6529 T-MOBILE USA, INC. 668      
520-220 9 Sierra Vista AZ TCSMAZOI3MD  6529 T-MOBILE USA, INC. 668      

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.