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.

Switch: TCSMAZCHFMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
520-641 A Benson AZ 516J TON80 COMMUNICATIONS, LLC 668      
520-646 A Nogales AZ 516J TON80 COMMUNICATIONS, LLC 668      
520-929 A Willcox AZ 516J TON80 COMMUNICATIONS, LLC 668      
520-934 A Tucson AZ 516J TON80 COMMUNICATIONS, LLC 668      
520-949 A Santa Rosa AZ 516J TON80 COMMUNICATIONS, LLC 668      
520-994 A Sasabe AZ 516J TON80 COMMUNICATIONS, LLC 668      
928-534 A Safford AZ 516J TON80 COMMUNICATIONS, LLC 668      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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