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: TCSNAZCADS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
520-232 A Tucson AZ 9636 QWEST CORPORATION 668      
520-232 0 Tucson AZ 9636 QWEST CORPORATION 668      
520-232 1 Tucson AZ 9636 QWEST CORPORATION 668      
520-232 5 Tucson AZ 9636 QWEST CORPORATION 668      
520-232 6 Tucson AZ 9636 QWEST CORPORATION 668      
520-232 7 Tucson AZ 9636 QWEST CORPORATION 668      
520-232 8 Tucson AZ 9636 QWEST CORPORATION 668      
520-232 9 Tucson AZ 9636 QWEST CORPORATION 668      
520-299 A Tucson AZ 9636 QWEST CORPORATION 668      
520-529 A Tucson AZ 9636 QWEST CORPORATION 668      
520-577 A Tucson AZ 9636 QWEST CORPORATION 668      
520-615 A Tucson AZ 9636 QWEST CORPORATION 668      

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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