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: 472

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-472 A Casa Grande AZ MRCPAZMADS0  9636 QWEST CORPORATION 666      
520-472 0 Casa Grande AZ   5562 METROPCS, INC. 666   2020-08-07   
520-472 1 Casa Grande AZ   6529 T-MOBILE USA, INC. 666   2021-06-17   
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 4 Casa Grande AZ   624H ONVOY SPECTRUM, LLC 666   2020-11-03   
520-472 5 Casa Grande AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666   2024-08-08   
520-472 6 Casa Grande AZ   9636 QWEST CORPORATION 666   2020-11-21   
520-472 7 Casa Grande AZ   6529 T-MOBILE USA, INC. 666   2020-11-27   
520-472 8 Casa Grande AZ   6529 T-MOBILE USA, INC. 666   2021-06-17   
520-472 9 Casa Grande AZ   6529 T-MOBILE USA, INC. 666   2021-06-17   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.