Equipment unit · VIN-decoded · NHTSA vPIC

2018 Trailboss Trailboss Trailer

4S0DP3129J1003843 · Trailer · TRAILER
Carriers run under2
21 mo
Inspections3
all-time
OOS inspections2
of 3
First seenJul 3, 2024
CA
Last seenApr 29, 2026
CA
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
4S0DP3129J1003843
Make
Trailboss
Model
Trailboss Trailer
Model year
2018
Body class
Trailer
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Aug 9, 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
4S0

Deterministic · VIN positions 1–3.

Vehicle descriptor section
DP312

Deterministic · VIN positions 4–8.

Check digit
9 · valid

Deterministic · position 9; calculated value 9.

Model year candidates
1988 or 2018

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

North American serial sequence
003843

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
2018

Observed directly for this VIN via NHTSA vPIC.

Observed make
TRAILBOSS

Observed directly for this VIN via NHTSA vPIC.

Observed model
Trailboss 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 · Jul 3, 2024 – Apr 29, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Apr 29, 2026CAI · Full1OOSD'S TRUCKING SERVICE INC 30984154RL5930/CA
Jul 15, 2024CAI · Full5OOSAMERICAN ASPHALT REPAIR AND RESURFACING CO INC 17016874RL5930/CA
Jul 3, 2024CAIII · Driver-only0AMERICAN ASPHALT REPAIR AND RESURFACING CO INC 17016874RL5930/CA
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
D'S TRUCKING SERVICE INC3098415Apr 29, 2026Apr 29, 20261CA
AMERICAN ASPHALT REPAIR AND RESURFACING CO INC1701687Jul 3, 2024Jul 15, 20242CA
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.
4RL5930CAD'S TRUCKING SERVICE INCApr 29, 2026Apr 29, 20261
4RL5930CAAMERICAN ASPHALT REPAIR AND RESURFACING CO INCJul 3, 2024Jul 15, 20242
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Aug 9, 2026