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406 Area Code — Scam Calls, Location & Who's Calling

Area code 406 serves Montana in the Mountain time zone, in service since 1947. The FCC has 2,070 unwanted-call complaints against 1,709 different 406 numbers on record. Look up the exact number that called you below.

Most-reported 406 numbers

Ranked by FCC unwanted-call complaints. Click a number for its full report.

406 unwanted-call complaints, last 12 months

Monthly FCC complaint volume against 406 numbers. Spikes usually mark an active robocall campaign cycling through the code.

Carriers operating in 406

Carriers assigned to 406 prefixes that visitors have looked up so far — resolved from official NPA-NXX assignment records.

  • QWEST CORPORATIONI · 16 prefixes
  • ONVOY, LLC - MTC · 6 prefixes
  • CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MTWireless · 6 prefixes
  • NEW CINGULAR WIRELESS PCS, LLCWireless · 4 prefixes
  • LEVEL 3 COMMUNICATIONS, LLC - MTC · 3 prefixes
  • BLACKFOOT COMMUNICATIONS, INC. - MTWireless · 2 prefixes
  • CENTURYTEL OF MONTANA, INC. DBA CENTURYLINKI · 2 prefixes
  • SAGEBRUSH CELLULAR, INC.Wireless · 2 prefixes

About area code 406

Serves
Montana
Time zone
Mountain
In service since
1947-01-01
Overlay
No

Source: NANPA numbering records, refreshed weekly.

Spam calls from 406? What to know

Seeing repeated missed calls from 406 numbers you don't recognize is the classic signature of neighbor-spoofing robocall campaigns. The caller isn't necessarily in Montana — spoofing software displays whatever digits the campaign chooses. Never call unknown numbers back; look them up first, and report unwanted calls to the FCC to build the public record.

Area code 406 FAQs

Where is area code 406?

Area code 406 serves Montana, in the Mountain time zone. It has been in service since 1947.

Why do I keep getting calls from 406 numbers?

Robocallers use "neighbor spoofing" — displaying a number with a local area code to make you more likely to answer. A call showing area code 406 may not originate from Montana at all. Look up the full 10-digit number on this site to see its complaint history before calling back.

Are 406 numbers safe to call back?

Area codes themselves are neither safe nor unsafe — 406 contains millions of legitimate lines alongside any spoofed or spam numbers. The FCC has logged 2,070 unwanted-call complaints against 1,709 distinct 406 numbers in our current data window. Check the specific number's report page before returning a missed call.