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: 517

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-517 A Livingston MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2024-07-22   
406-517 0 Livingston MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2024-07-22   
406-517 1 Livingston MT BLNGMTMAXMD  6529 T-MOBILE USA, INC. 650   2024-09-23   
406-517 2 Livingston MT BLNGMTWEDMD  624H ONVOY SPECTRUM, LLC 650   2025-01-16   
406-517 3 Livingston MT   6010 NEW CINGULAR WIRELESS PCS, LLC 650   2025-02-10   
406-517 8 Livingston MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2024-11-23   
406-517 9 Livingston MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2025-02-12   

Last updated: Tue, 15 Jul 2025 18:46:49 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.