Equipment unit · VIN-decoded · NHTSA vPIC

2001 Cps Trailer Company End Dump Trailer

4Z45156271P003608 · Trailer · TRAILER
Carriers run under2
21 mo
Inspections3
all-time
OOS inspections1
of 3
First seenJun 13, 2023
AK
Last seenMar 18, 2025
AK
Inspected under 2 different carriers in 21 months
A unit that bounces between many operators can indicate slip-seating, heavy sub-haul, or double-brokering. Review the carrier timeline below for load integrity — context for human judgment, not a verdict.
01

Decoded identity

From the 17-character VIN via NHTSA vPIC

VIN
4Z45156271P003608
Make
Cps Trailer Company
Model
End Dump Trailer
Model year
2001
Body class
Trailer
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Aug 21, 2026
vPIC returns make / model / year / body class / GVWR. Fields it does not resolve are shown as Not decoded rather than guessed.
Decode evidence & sources

Deterministic structure

These fields come directly from VIN positions and the published checksum calculation, with zero store IO.

World manufacturer identifier
4Z4

Deterministic · VIN positions 1–3.

Vehicle descriptor section
51562

Deterministic · VIN positions 4–8.

Check digit
7 · valid

Deterministic · position 9; calculated value 7.

Model year candidates
2001 or 2031

Position 10 repeats every 30 years; both candidates are retained and neither is silently selected.

North American serial sequence
003608

Deterministic · positions 12–17 for a North American WMI.

Sourced platform inference

The prefix store publishes only at support ≥ 3 and purity ≥ 90%. Prefix confidence is shown beside every established platform claim.

Not established

No supported platform claim is established for this prefix

The resolver answered successfully but returned no row above the evidence floor. This does not mean the vehicle has no platform or that no data exists; it means this store cannot make the claim.

Federal observation (NHTSA vPIC)

What the federal corpus observed directly for this exact VIN — independent of, and sometimes more specific than, the prefix-level inference above.

Observed model year
2001

Observed directly for this VIN via NHTSA vPIC.

Observed make
CPS TRAILER COMPANY

Observed directly for this VIN via NHTSA vPIC.

Observed model
End Dump Trailer

Observed directly for this VIN via NHTSA vPIC.

Observed body class
Trailer

Observed directly for this VIN via NHTSA vPIC.

Observed vehicle type
TRAILER

Observed directly for this VIN via NHTSA vPIC.

GVWR
Not established

Observed directly for this VIN via NHTSA vPIC.

Not established

  • platform make
  • platform model
  • model line
  • generation
  • cab type

These are withheld claims, not negative findings.

02

Inspection history

Every roadside inspection of this VIN, newest first · Jun 13, 2023 – Mar 18, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
Mar 18, 2025AKIII · Driver-only0CENTRAL ENVIRONMENTAL INC 4994807108528SU/AK
Feb 18, 2025AKII · Walk-around2OOSCENTRAL ENVIRONMENTAL INC 4994808528SV/AK
Jun 13, 2023AKII · Walk-around3ROBERT RIDDLE 16981918528SU/AK
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
CENTRAL ENVIRONMENTAL INC499480Feb 18, 2025Mar 18, 20252AK
ROBERT RIDDLE1698191Jun 13, 2023Jun 13, 20231AK
Names are left-joined from the FMCSA census; a DOT with no census match falls back to its number.
04

Plate & unit-number history

The same truck under different plate registrations across carriers

PlateState / prov.Unit no.CarrierDate rangeInsp.
7108528SUAK2CENTRAL ENVIRONMENTAL INCMar 18, 2025Mar 18, 20251
8528SVAK2CENTRAL ENVIRONMENTAL INCFeb 18, 2025Feb 18, 20251
8528SUAKROBERT RIDDLEJun 13, 2023Jun 13, 20231
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Aug 21, 2026