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.
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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
307-545 0 Old Faithful WY 508J CENTURYLINK COMMUNICATIONS, LLC 650   2016-08-19   
406-282 5 Manhattan MT 508J CENTURYLINK COMMUNICATIONS, LLC 650   2016-08-11   
406-426 7 Red Lodge MT 508J CENTURYLINK COMMUNICATIONS, LLC 650   2016-08-12   
406-577 7 Bozeman MT 508J CENTURYLINK COMMUNICATIONS, LLC 650   2016-08-10   
406-601 5 Billings MT 508J CENTURYLINK COMMUNICATIONS, LLC 650   2017-11-30   
406-601 6 Billings MT 508J CENTURYLINK COMMUNICATIONS, LLC 650   2017-11-30   
406-601 7 Billings MT 508J CENTURYLINK COMMUNICATIONS, LLC 650   2017-11-30   
406-613 A Bozeman MT 508J CENTURYLINK COMMUNICATIONS, LLC 650      
406-613 1 Bozeman MT 508J CENTURYLINK COMMUNICATIONS, LLC 650   2022-08-18   
406-613 2 Bozeman MT 508J CENTURYLINK COMMUNICATIONS, LLC 650   2022-08-18   
406-613 3 Bozeman MT 508J CENTURYLINK COMMUNICATIONS, LLC 650   2022-08-18   
406-613 4 Bozeman MT 508J CENTURYLINK COMMUNICATIONS, LLC 650   2022-08-18   
406-613 5 Bozeman MT 508J CENTURYLINK COMMUNICATIONS, LLC 650   2022-08-18   
406-668 8 Fromberg MT 508J CENTURYLINK COMMUNICATIONS, LLC 650   2016-08-11   
406-729 A Wilsall MT 508J CENTURYLINK COMMUNICATIONS, LLC 650      
406-729 7 Wilsall MT 508J CENTURYLINK COMMUNICATIONS, LLC 650   2016-11-11   
406-740 7 Colstrip MT 508J CENTURYLINK COMMUNICATIONS, LLC 650   2016-08-10   
406-742 7 Fairview MT 508J CENTURYLINK COMMUNICATIONS, LLC 650   2016-08-11   
406-743 7 Laurel MT 508J CENTURYLINK COMMUNICATIONS, LLC 650   2016-08-11   
406-780 6 Columbus MT 508J CENTURYLINK COMMUNICATIONS, LLC 650   2016-08-10   
406-795 4 Wibaux MT 508J CENTURYLINK COMMUNICATIONS, LLC 650   2016-08-12   
406-800 7 Bridger MT 508J CENTURYLINK COMMUNICATIONS, LLC 650   2016-08-10   
406-813 4 Belgrade MT 508J CENTURYLINK COMMUNICATIONS, LLC 650   2016-08-10   
406-838 4 Cooke City MT 508J CENTURYLINK COMMUNICATIONS, LLC 650   2016-08-10   
406-851 7 Miles City MT 508J CENTURYLINK COMMUNICATIONS, LLC 650   2016-08-12   
406-943 7 Sidney MT 508J CENTURYLINK COMMUNICATIONS, LLC 650   2016-08-12   
406-946 7 Livingston MT 508J CENTURYLINK COMMUNICATIONS, LLC 650   2016-08-11   
406-970 A Billings MT 508J CENTURYLINK COMMUNICATIONS, LLC 650      
406-970 7 Billings MT 508J CENTURYLINK COMMUNICATIONS, LLC 650   2016-08-01   
406-987 6 Glendive MT 508J CENTURYLINK COMMUNICATIONS, LLC 650   2016-08-11   
701-695 6 East Fairview ND 508J CENTURYLINK COMMUNICATIONS, LLC 650   2016-08-11   
701-829 6 East Sidney ND 508J CENTURYLINK COMMUNICATIONS, LLC 650   2016-08-11   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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