Area Code 406

Billings, Montana · MST/MDT (UTC-7) · United States

Area Code
406
City
Billings, MT
Time Zone
MST/MDT
UTC Offset
UTC-7 / UTC-6 DST
DST
Observed
Introduced
1947

Where Is Area Code 406?

Entire state of Montana

Covers all of Montana. "Big Sky Country" — 4th largest state by area.

Major Cities & Neighborhoods
BillingsMissoulaGreat FallsHelenaBozeman

Time Zone for Area Code 406

Standard Time
MST (UTC-7)
Daylight Time
MDT (UTC-6)
DST 2026 Start
March 8, 2026
DST 2026 End
November 1, 2026
Country
United States
IANA Zone
America/Denver

Frequently Asked Questions

Where is area code 406?

Area code 406 is located in Billings, Montana (United States). It covers Entire state of Montana.

What time zone is area code 406 in?

Area code 406 (Billings, Montana) is in the MST/MDT time zone. Standard time is UTC-7 and UTC-6 during Daylight Saving Time.

Is area code 406 a scam?

Area code 406 is a legitimate NANPA-assigned code serving Billings, Montana. However, scammers can spoof any area code. If you receive an unexpected call from (406), verify the caller before sharing personal information.

What time is it in area code 406 right now?

Area code 406 follows MST/MDT (UTC-7). See the live clock at whattime.city/denver/ for the exact current time in Billings.

When was area code 406 introduced?

Area code 406 was introduced in 1947. Covers all of Montana. "Big Sky Country" — 4th largest state by area.