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: 866

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-866 A Casa Grande AZ FLRNAZMARS1  9636 QWEST CORPORATION 666      
520-866 0 Casa Grande AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666   2014-09-25   
520-866 1 Casa Grande AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666   2016-09-22   
520-866 2 Casa Grande AZ FLRNAZMARS1  9636 QWEST CORPORATION 666   2007-06-11   
520-866 3 Casa Grande AZ FLRNAZMARS1  9636 QWEST CORPORATION 666   2007-06-11   
520-866 4 Casa Grande AZ FLRNAZMARS1  9636 QWEST CORPORATION 666      
520-866 5 Casa Grande AZ FLRNAZMARS1  9636 QWEST CORPORATION 666      
520-866 6 Casa Grande AZ FLRNAZMARS1  9636 QWEST CORPORATION 666      
520-866 7 Casa Grande AZ FLRNAZMARS1  9636 QWEST CORPORATION 666      
520-866 8 Casa Grande AZ FLRNAZMARS1  9636 QWEST CORPORATION 666   2007-06-11   
520-866 9 Casa Grande AZ MRCPAZMADS0  9636 QWEST CORPORATION 666   2007-07-16   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.