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: 607

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-607 A Kalispell MT KLSLMTXC4MD  7870 BLACKFOOT COMMUNICATIONS, INC. - MT 648      
406-607 0 Kalispell MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-607 1 Kalispell MT MSSLMTMACMD  6529 T-MOBILE USA, INC. 648      
406-607 2 Kalispell MT MSSLMTMACMD  6529 T-MOBILE USA, INC. 648      
406-607 3 Kalispell MT MSSLMTMACMD  6529 T-MOBILE USA, INC. 648      
406-607 4 Kalispell MT KLSLMTXC4MD  7870 BLACKFOOT COMMUNICATIONS, INC. - MT 648      
406-607 5 Kalispell MT MSSLMTMACMD  6529 T-MOBILE USA, INC. 648      
406-607 6 Kalispell MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-607 7 Kalispell MT MSSLMTMACMD  6529 T-MOBILE USA, INC. 648      
406-607 8 Kalispell MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-607 9 Kalispell MT MSSLMTMACMD  6529 T-MOBILE USA, INC. 648      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.