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: 622

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
605-622 A Aberdeen SD ABRDSDCODS0  9631 QWEST CORPORATION 640      
605-622 0 Aberdeen SD   106F BANDWIDTH.COM CLEC, LLC - SD 640   2008-11-29   
605-622 1 Aberdeen SD   693G TELEPORT COMMUNICATIONS AMERICA SD-LLC 640   2016-03-09   
605-622 2 Aberdeen SD   9631 QWEST CORPORATION 640      
605-622 3 Aberdeen SD   9631 QWEST CORPORATION 640      
605-622 4 Aberdeen SD   9631 QWEST CORPORATION 640      
605-622 5 Aberdeen SD   9631 QWEST CORPORATION 640      
605-622 6 Aberdeen SD   6125 NORTHERN VALLEY COMMUNICATIONS, LLC 640   2006-04-04   
605-622 7 Aberdeen SD   9631 QWEST CORPORATION 640      
605-622 8 Aberdeen SD   6125 NORTHERN VALLEY COMMUNICATIONS, LLC 640   2006-04-04   
605-622 9 Aberdeen SD   6125 NORTHERN VALLEY COMMUNICATIONS, LLC 640   2006-04-04   

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.