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: 308

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
605-308 A North Sioux City SD SXCYIA78X9X  6529 T-MOBILE USA, INC. 630      
605-308 0 North Sioux City SD SXCYIADT9MD  162G ONVOY, LLC - SD 630   2023-08-20   
605-308 5 North Sioux City SD SXCYIADTKMD  693G TELEPORT COMMUNICATIONS AMERICA SD-LLC 630   2022-09-02   
605-308 6 North Sioux City SD SXCYIA78X9X  6529 T-MOBILE USA, INC. 630   2022-07-28   
605-308 7 North Sioux City SD SXCYIA78X9X  6529 T-MOBILE USA, INC. 630   2022-07-28   
605-308 8 North Sioux City SD SXCYIA78X9X  6529 T-MOBILE USA, INC. 630   2022-07-28   
605-308 9 North Sioux City SD SXCYIA78X9X  6529 T-MOBILE USA, INC. 630   2022-07-28   

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.