License Plate WY A21221 (Wyoming) — Mountain Mud Service & Supply Inc
USDOT 1444132 · 2006 Peterbilt 379
Most recently recorded carrier for this plate
Mountain Mud Service & Supply Inc Inactive
- USDOT
- 1444132
- MC
- 1108542
- Status
- Inactive
- Type
- Motor Carrier
- Based in
- Gillette, WY
- Power units
- 10
- Drivers
- 7
Carrier recorded at the latest inspection in the available records (2026-03-31). This does not establish current ownership or confirm that the carrier still operates this vehicle.
View full carrier profile →Authority, insurance & bonds, safety scores, crash history, inspections and the full fleet list.
What this means
License plate WY-A21221 appears in FMCSA inspection records 3 times. Recorded on one vehicle: VIN 1XP5DU0X06N891058 (2006 Peterbilt 379). Most recent operating carrier: Mountain Mud Service & Supply Inc (USDOT 1444132). Vehicle make on file: Peterbilt (PTRB) (STRAIGHT TRUCK). 1 out-of-service result across all inspections.
About this plate
Commercial license plate WY-A21221 (Wyoming) appears in FMCSA roadside inspection records tied to one commercial vehicle. Inspection activity under this plate runs from 2025-03-11 to 2026-03-31. The latest inspection was in Wyoming, a Level III — driver and paperwork only.
Vehicle on this plate
This plate is associated with a single vehicle, a 2006 Peterbilt 379 — VIN 1XP5DU0X06N891058 (straight truck).
Combined inspection & out-of-service record
Across all vehicles on this plate there are 3 inspections on FMCSA record. The records show 1 out-of-service violation across 3 inspections. OOS breakdown: 1 vehicle. The leading violation category is Vehicle Maintenance (8). Vehicle Maintenance covers brakes, lights, tires, load securement and other mechanical condition items.
Operators
Operated by Mountain Mud Service & Supply Inc (USDOT 1444132) in every inspection on record.
Vehicle detail (inspections per unit)
FMCSA BASIC safety category breakdown
| BASIC Category | Violations | Status |
|---|---|---|
| Vehicle Maintenance | 8 | ⚠ High |
| Unsafe Driving | 0 | ✓ Clean |
| Driver Fitness | 0 | ✓ Clean |
| Fatigued Driving (HOS) | 0 | ✓ Clean |
| Controlled Substances | 0 | ✓ Clean |
| Hazmat | 0 | ✓ Clean |