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: 675

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
605-675 A Vermillion SD   6701 AERIAL COMMUNICATIONS, INC. DBA T-MOBILE USA 640      
605-675 5 Vermillion SD   145J TERRA NOVA TELECOM INC. 640   2022-06-03   
605-675 6 Vermillion SD   5180 LEVEL 3 COMMUNICATIONS, LLC - SD 640   2022-02-18   
605-675 7 Vermillion SD   162G ONVOY, LLC - SD 640   2019-09-13   
605-675 9 Vermillion SD   6982 BROOKINGS MUNICIPAL UTILITIES 640      

Last updated: Fri, 01 Jul 2022 02:53:40 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.