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: CSGRAZMADS0

Remotes:

Switch Switch name Switch type
AZCYAZ03RS1  ARIZONA CITY  RSC 
CLDGAZMARS1  COOLIDGE  RSC 
ELOYAZ01RS1  ELOY  RSC 
FLRNAZMARS1  FLORENCE  RSC 
STFDAZMARS1  STANFIELD  RSC 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
520-316 A Casa Grande AZ 9636 QWEST CORPORATION 666      
520-374 A Casa Grande AZ 9636 QWEST CORPORATION 666      
520-421 A Casa Grande AZ 9636 QWEST CORPORATION 666      
520-423 A Casa Grande AZ 9636 QWEST CORPORATION 666      
520-423 0 Casa Grande AZ 9636 QWEST CORPORATION 666      
520-423 1 Casa Grande AZ 9636 QWEST CORPORATION 666      
520-423 2 Casa Grande AZ 9636 QWEST CORPORATION 666      
520-423 8 Casa Grande AZ 9636 QWEST CORPORATION 666      
520-426 A Casa Grande AZ 9636 QWEST CORPORATION 666      
520-494 5 Casa Grande AZ 9636 QWEST CORPORATION 666      
520-494 6 Casa Grande AZ 9636 QWEST CORPORATION 666      
520-836 A Casa Grande AZ 9636 QWEST CORPORATION 666      
520-858 A Casa Grande AZ 9636 QWEST CORPORATION 666      
520-858 7 Casa Grande AZ 9636 QWEST CORPORATION 666   2007-12-07   
520-858 8 Casa Grande AZ 9636 QWEST CORPORATION 666   2007-12-07   
520-876 A Casa Grande AZ 9636 QWEST CORPORATION 666      

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

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