406 covers Billings, Missoula, Great Falls and more, on Mountain time. Paste a 406 number to see whether it is valid, mobile or landline, and whether it has been reported.
# free & rate-limited · no signup · live results from the same engine as the API
By number of exchanges assigned to each rate centre — where most 406 numbers were issued.
The carrier each block of numbers was assigned to. A number that has been ported keeps its digits and changes network, so this is where a 406 number started, not necessarily where it is today.
Between Aug 25, 2026 and Oct 15, 2026, consumers filed 964 complaints with the FTC about 902 different 406 numbers; 61% were recorded messages. A caller ID can be spoofed, so a complaint against a number is evidence about calls showing that number, not proof about its owner. How 406 compares with other area codes →
Calling a list of 406 numbers? Check up to 20 at once on the free call list cleaner — line type, carrier and complaint history for each — or one number on the spam phone checker.
406 is in Montana, United States. Its busiest exchanges are in Billings, Missoula, Great Falls, Bozeman.
Mountain (UTC−7, UTC−6 in summer).
Dial your exit code, then 1, then 406 and the seven-digit number: +1 406 XXX XXXX. Stored for a dialer or CRM, that is +1406XXXXXXX in E.164.
The area code says nothing on its own — spammers spoof local codes so the call looks familiar. In the FTC's complaint files since Aug 25, 2026, 902 different 406 numbers were reported. Check the exact number with the free lookup above.