License Plate CA 4WP5405 (California) — Diamond Trucking Inc
USDOT 491637 · 2008 Acro Trailer Company
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 |
|---|---|---|---|
| 2026-02-10 | 1A911442581005032 | CA 4WP5405 | DIAMOND TRUCKING INC · USDOT 491637 |
| 2025-08-15 | 1A911442581005032 | CA 4WP5405 | M P ENVIRONMENTAL SERVICES INC · USDOT 441566 |
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
Diamond Trucking Inc Active
- USDOT
- 491637
- MC
- 240905
- Status
- Active
- Type
- Carrier & Shipper & Cargo Tank Facility
- Based in
- Phoenix, AZ
- Power units
- 76
- Drivers
- 81
- Inspections (24 mo)
- 134
- Crashes (24 mo)
- 5
- Vehicle OOS rate
- 1.6%
Carrier recorded at the latest inspection in the available records (2026-02-10). 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.This plate has also been operated by 1 other carrier (listed below).
What this means
License plate CA-4WP5405 appears in FMCSA inspection records 6 times. Recorded on one vehicle: VIN 1A911442581005032 (2008 Acro Trailer Company). Operated by 2 different carriers (DOT numbers) over its inspection history. Most recent operating carrier: Diamond Trucking Inc (USDOT 491637). Vehicle make on file: Acro Trailer Company (ACRO TANK) (SEMI-TRAILER). 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 CA-4WP5405 (California) appears in FMCSA roadside inspection records tied to one commercial vehicle. Inspection activity under this plate runs from 2024-10-30 to 2026-02-10. The latest inspection was in Arizona, a Level II — walk-around inspection of the driver and the vehicle. That is outside the plate's issuing jurisdiction (California).
Vehicle on this plate
This plate is associated with a single vehicle, a 2008 Acro Trailer Company — VIN 1A911442581005032 (semi-trailer).
Combined inspection & out-of-service record
Across all vehicles on this plate there are 6 inspections 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
2 carriers have operated vehicles under this plate (most recent first): Diamond Trucking Inc (USDOT 491637) on 2026-02-10; M P Environmental Services Inc (USDOT 441566) from 2024-10-30 to 2025-08-15.