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: 236

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-236 A Sierra Vista AZ TCSMAZOI4MD  5562 METROPCS, INC. 668      
520-236 0 Sierra Vista AZ TCSMAZOI4MD  5562 METROPCS, INC. 668      
520-236 1 Sierra Vista AZ TCSMAZOI3MD  6529 T-MOBILE USA, INC. 668      
520-236 2 Sierra Vista AZ TCSMAZOI3MD  6529 T-MOBILE USA, INC. 668      
520-236 3 Sierra Vista AZ   5562 METROPCS, INC. 668      
520-236 4 Sierra Vista AZ   5562 METROPCS, INC. 668      
520-236 5 Sierra Vista AZ TCSMAZOI3MD  6529 T-MOBILE USA, INC. 668      
520-236 6 Sierra Vista AZ TCSMAZOI3MD  6529 T-MOBILE USA, INC. 668      
520-236 7 Sierra Vista AZ TCSMAZOI3MD  6529 T-MOBILE USA, INC. 668      
520-236 8 Sierra Vista AZ TCSMAZOI3MD  6529 T-MOBILE USA, INC. 668      
520-236 9 Sierra Vista AZ   5562 METROPCS, INC. 668      

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.