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: 406 [Rate centres in NPA 406] [Dial plan for NPA 406]

NXX: 970

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-970 A Billings MT BLNGMTWE8MD  508J CENTURYLINK COMMUNICATIONS, LLC 650      
406-970 0 Billings MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2019-04-26   
406-970 1 Billings MT BLNGMTWECMD  551G NUSO, LLC 650   2017-10-17   
406-970 2 Billings MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650   2022-10-22   
406-970 3 Billings MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2020-05-13   
406-970 4 Billings MT BLNGMTMAXMD  6529 T-MOBILE USA, INC. 650   2021-08-22   
406-970 5 Billings MT BLNGMTMAXMD  6529 T-MOBILE USA, INC. 650   2021-08-22   
406-970 6 Billings MT BLNGMTMAXMD  6529 T-MOBILE USA, INC. 650   2021-08-22   
406-970 7 Billings MT BLNGMTWE8MD  508J CENTURYLINK COMMUNICATIONS, LLC 650   2016-08-01   
406-970 8 Billings MT BLNGMTMAXMD  6529 T-MOBILE USA, INC. 650   2021-06-11   
406-970 9 Billings MT BLNGMTMAXMD  6529 T-MOBILE USA, INC. 650   2021-06-11   

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.