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-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
520-259 A Tucson AZ TCSNAZQKDS0  668      
520-267 A Sierra Vista AZ TCSNAZQKDS0  668      
602-624 A Phoenix AZ PHNEAZ32DS0  666      
928-253 A Prescott AZ PHNZAZNGDS0  666      
928-262 A Yuma AZ PHNZAZNGDS0  666      
928-789 A Flagstaff AZ PHNZAZNGDS0  666      

Last updated: Sun, 04 Apr 2021 19:28:27 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.