Equipment unit · VIN-decoded · NHTSA vPIC

2018 Stoughton Trailers

1DW1A5323JS778725 · Trailer · TRAILER
Carriers run under2
18 mo
Inspections2
all-time
OOS inspections0
of 2
First seenDec 19, 2023
MI
Last seenJun 30, 2025
OH
Inspected under 2 different carriers in 18 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
1DW1A5323JS778725
Make
Stoughton Trailers
Model
Stoughton Trailers
Model year
2018
Body class
Trailer
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Aug 12, 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
1DW

Deterministic · VIN positions 1–3.

Vehicle descriptor section
1A532

Deterministic · VIN positions 4–8.

Check digit
3 · valid

Deterministic · position 9; calculated value 3.

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
778725

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.

Make
STOUGHTON TRAILERS

Prefix basis · 12,945 decoded VINs at 100.0% prefix purity.

Model
Stoughton Trailers

Prefix basis · 12,945 decoded VINs at 100.0% prefix purity.

Model line
Not established

No sourced model-line label is established.

No source established for this field.

Generation
Not established

No sourced generation label is established.

No source established for this field.

Cab type
Not established

No sourced cab label is established.

No source established for this field.

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
STOUGHTON TRAILERS

Observed directly for this VIN via NHTSA vPIC.

Observed model
Stoughton Trailers

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

  • model line
  • generation
  • cab type

These are withheld claims, not negative findings.

02

Inspection history

Every roadside inspection of this VIN, newest first · Dec 19, 2023 – Jun 30, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
Jun 30, 2025OHIII · Driver-only0RIAR FREIGHT SYSTEMS INC 3117779Z9479A/ON
Dec 19, 2023MIIII · Driver-only1TRUE NORTH FREIGHT SOLUTIONS INC 2630164P3877F/ON
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
RIAR FREIGHT SYSTEMS INC3117779Jun 30, 2025Jun 30, 20251ON
TRUE NORTH FREIGHT SOLUTIONS INC2630164Dec 19, 2023Dec 19, 20231ON
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.
Z9479AONRIAR FREIGHT SYSTEMS INCJun 30, 2025Jun 30, 20251
P3877FON2TRUE NORTH FREIGHT SOLUTIONS INCDec 19, 2023Dec 19, 20231
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Aug 12, 2026