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.

Fort Thompson, SD

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
605-245 A KMBLSDXADS2  1670 MIDSTATE COMMUNICATIONS, INC. 640      
605-417 A FTTHSDXADS2  424F NATIVE AMERICAN TELECOM, LLC - SD 640      
605-417 0 FTTHSDXADS2  424F NATIVE AMERICAN TELECOM, LLC - SD 640   2017-05-04   
605-417 1 FTTHSDXADS2  424F NATIVE AMERICAN TELECOM, LLC - SD 640   2017-05-04   
605-417 2 FTTHSDXADS2  424F NATIVE AMERICAN TELECOM, LLC - SD 640   2017-05-04   
605-417 3 FTTHSDXADS2  424F NATIVE AMERICAN TELECOM, LLC - SD 640   2017-05-04   
605-417 4 FTTHSDXADS2  424F NATIVE AMERICAN TELECOM, LLC - SD 640   2017-05-04   
605-417 5 FTTHSDXADS2  424F NATIVE AMERICAN TELECOM, LLC - SD 640   2017-05-04   
605-417 6 FTTHSDXADS2  424F NATIVE AMERICAN TELECOM, LLC - SD 640   2017-05-04   
605-417 7 FTTHSDXADS2  424F NATIVE AMERICAN TELECOM, LLC - SD 640   2017-05-04   
605-417 8 FTTHSDXADS2  424F NATIVE AMERICAN TELECOM, LLC - SD 640   2017-05-04   
605-417 9 FTTHSDXADS2  424F NATIVE AMERICAN TELECOM, LLC - SD 640   2017-05-04   
605-477 A FTTHSDXADS2  424F NATIVE AMERICAN TELECOM, LLC - SD 640      
605-752 A SXFLSDPSCMD  516J TON80 COMMUNICATIONS, LLC 640      
605-752 9 SXFLSDPSCMD  516J TON80 COMMUNICATIONS, LLC 640   2022-03-16   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.