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: 605 [Rate centres in NPA 605] [Dial plan for NPA 605]

NXX: 524

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
605-524 A McIntosh SD MRTWSDCORS2  9631 QWEST CORPORATION 640      
605-524 0 McIntosh SD   9631 QWEST CORPORATION 640      
605-524 1 McIntosh SD   9631 QWEST CORPORATION 640      
605-524 2 McIntosh SD   162G ONVOY, LLC - SD 640   2019-09-13   
605-524 3 McIntosh SD   9631 QWEST CORPORATION 640      
605-524 4 McIntosh SD   106F BANDWIDTH.COM CLEC, LLC - SD 640   2018-05-17   
605-524 5 McIntosh SD   106F BANDWIDTH.COM CLEC, LLC - SD 640   2018-05-17   
605-524 6 McIntosh SD   508J CENTURYLINK COMMUNICATIONS, LLC 640   2017-06-03   
605-524 7 McIntosh SD   162G ONVOY, LLC - SD 640   2009-05-28   
605-524 8 McIntosh SD   162G ONVOY, LLC - SD 640   2011-02-16   
605-524 9 McIntosh SD   9631 QWEST CORPORATION 640      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.