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: MRCPAZMADS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
520-217 A Casa Grande AZ 9636 QWEST CORPORATION 666      
520-217 3 Casa Grande AZ 9636 QWEST CORPORATION 666   2016-01-28   
520-217 4 Casa Grande AZ 9636 QWEST CORPORATION 666   2016-05-14   
520-217 5 Casa Grande AZ 9636 QWEST CORPORATION 666   2016-05-14   
520-233 2 Casa Grande AZ 9636 QWEST CORPORATION 666   2006-11-14   
520-340 3 Casa Grande AZ 9636 QWEST CORPORATION 666   2018-06-27   
520-423 9 Casa Grande AZ 9636 QWEST CORPORATION 666   2007-03-19   
520-472 A Casa Grande AZ 9636 QWEST CORPORATION 666      
520-472 2 Casa Grande AZ 9636 QWEST CORPORATION 666   2019-09-25   
520-472 3 Casa Grande AZ 9636 QWEST CORPORATION 666   2019-09-25   
520-472 6 Casa Grande AZ 9636 QWEST CORPORATION 666   2020-11-21   
520-494 2 Casa Grande AZ 9636 QWEST CORPORATION 666   2006-08-09   
520-494 7 Casa Grande AZ 9636 QWEST CORPORATION 666      
520-568 A Casa Grande AZ 9636 QWEST CORPORATION 666      
520-759 2 Casa Grande AZ 9636 QWEST CORPORATION 666   2018-11-14   
520-759 3 Casa Grande AZ 9636 QWEST CORPORATION 666   2018-11-14   
520-866 9 Casa Grande AZ 9636 QWEST CORPORATION 666   2007-07-16   

Last updated: Sat, 04 Jul 2026 13:07:56 UTC

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