Scam Calls from Area Code 406

Area code 406 covers all of Montana, a single-state code with reported activity concentrated in Billings, Missoula, Great Falls, Glendive, and Whitefish, along with spillover complaints filed from California and Washington. The code has generated 829 total complaints across 380 distinct numbers since February 2026, with activity still ongoing as of June 2026. That spread — more than two complaints per number on average — points to a relatively dispersed operation rather than a few heavily worked lines.

Debt reduction solicitations lead all categories with 118 complaints, followed closely by impersonation calls at 107. Medical and prescription pitches account for 45 complaints, and dropped or silent calls — often used to confirm active lines — add another 68. Work-from-home schemes trail with 8 complaints, represented almost entirely by 406-813-3108, which drew 6 of them.

The single most-complained-about number, 406-278-8810, has accumulated 43 complaints, making it by far the most active line in the code. Its category is not recorded in the complaint data, but the volume alone places it well above any categorized number. The next two busiest lines — 406-431-6997 at 15 complaints and 406-740-6428 at 12 — are similarly uncategorized, suggesting either rapid rotation or complaint patterns that don't map cleanly to a single pitch type. Together those three numbers account for 70 complaints, nearly a tenth of the area code's entire complaint load.

Categorized numbers fill out the picture: 406-665-4304 drew 10 complaints for medical and prescription calls, 406-698-9561 logged 7 for debt reduction, and 406-686-7338 logged 6 for impersonation. The impersonation category's 107 total complaints distributed across many numbers indicate a broad, low-per-number effort rather than a concentrated one — a pattern consistent with spoofed or frequently rotated caller IDs.

At rank 223 out of 358 area codes overall, 406 sits in the lower half of national volume, but among geographic Montana-class codes it ranks 23rd of 39, placing it in the middle tier regionally. The more telling detail is that the top uncategorized numbers are driving disproportionate complaint share while the dominant named categories — debt solicitation and impersonation — are spread thin across hundreds of lines. That combination of a few high-volume anonymous numbers alongside a broad, fragmented impersonation campaign suggests the code is being used both as a spoofed local presence to build trust with Montana recipients and as a testbed for rotating pitches, with debt and medical offers the primary commercial payloads.