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PHONE NUMBER PREFIXES IN THE 406 AREA CODE

Thousand digits 406-542 Area Code & Prefix

(406) 542-0xxx
(406) 542-1xxx
(406) 542-2xxx
(406) 542-3xxx
(406) 542-4xxx
(406) 542-5xxx
(406) 542-6xxx
(406) 542-7xxx
(406) 542-8xxx
(406) 542-9xxx