License Plate MO 21AS1S (Missouri) — Rex Lee Siemer Trucking Llc
USDOT 637791 · 2007 Peterbilt 379
Recorded vehicle, plate and carrier history
These are dated observations in the records available to us. They do not establish ownership, a sale, a transfer date, or continuous use between observations. The latest observation may not describe today’s vehicle or carrier.
| Observed dates | VIN | Plate | Reported carrier |
|---|---|---|---|
| 2025-11-04 | 1XP5DB9X67N674459 | MO 21AS1S | REX LEE SIEMER TRUCKING LLC · USDOT 637791 |
Evidence: FMCSA inspection observations and retained snapshots of our vehicle records. Coverage is incomplete; an unreported change cannot be dated from these records.
Most recently recorded carrier for this plate
Rex Lee Siemer Trucking Llc Active
- USDOT
- 637791
- MC
- 384420
- Status
- Active
- Type
- Motor Carrier
- Based in
- Mercer, MO
- Power units
- 17
- Drivers
- 9
- Inspections (24 mo)
- 14
- Crashes (24 mo)
- 2
- Vehicle OOS rate
- 20%
Carrier recorded at the latest inspection in the available records (2025-11-04). 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 MO-21AS1S appears in FMCSA inspection records 1 time. Recorded on one vehicle: VIN 1XP5DB9X67N674459 (2007 Peterbilt 379). Most recent operating carrier: Rex Lee Siemer Trucking Llc (USDOT 637791). Vehicle make on file: Peterbilt (PTRB) (TRUCK TRACTOR). No out-of-service violations are recorded under this plate in the available inspection records. Other violations may still be present.
About this plate
Commercial license plate MO-21AS1S (Missouri) appears in FMCSA roadside inspection records tied to one commercial vehicle. The most recent inspection activity under this plate was 2025-11-04. The latest inspection was in Illinois, a Level III — driver and paperwork only. That is outside the plate's issuing jurisdiction (Missouri).
Vehicle on this plate
This plate is associated with a single vehicle, a 2007 Peterbilt 379 — VIN 1XP5DB9X67N674459 (truck tractor).
Combined inspection & out-of-service record
Across all vehicles on this plate there are 1 inspection on FMCSA record. No out-of-service violations appear in the available records under this plate. This does not mean that every inspection was free of other violations.
Operators
Operated by Rex Lee Siemer Trucking Llc (USDOT 637791) in every inspection on record.