Equipment unit · VIN-decoded · NHTSA vPIC

2022 Stoughton Trailers

1DW1A5328NSA71029 · Trailer · TRAILER
Carriers run under3
24 mo
Inspections3
all-time
OOS inspections2
of 3
First seenJan 3, 2024
WI
Last seenJan 18, 2026
MO
Inspected under 3 different carriers in 24 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
1DW1A5328NSA71029
Make
Stoughton Trailers
Model
Stoughton Trailers
Model year
2022
Body class
Trailer
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Jul 19, 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
8 · valid

Deterministic · position 9; calculated value 8.

Model year candidates
1992 or 2022

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

North American serial sequence
A71029

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
2022

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 · Jan 3, 2024 – Jan 18, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Jan 18, 2026MOIII · Driver-only5OOSZHENZI TRANSPORTATION PA INC 4433121628890T/TN
Jan 5, 2026PAII · Walk-around9OOSZL TRUCKING INC 4352949628890T/TN
Jan 3, 2024WIII · Walk-around2AMERI FREIGHT SYSTEMS LLC 1251595858127ST/IL
03

Carriers this unit has run under

3 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
ZHENZI TRANSPORTATION PA INC4433121Jan 18, 2026Jan 18, 20261PA
ZL TRUCKING INC4352949Jan 5, 2026Jan 5, 20261PA
AMERI FREIGHT SYSTEMS LLC1251595Jan 3, 2024Jan 3, 20241IL
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.
628890TTNZHENZI TRANSPORTATION PA INCJan 18, 2026Jan 18, 20261
628890TTNZL TRUCKING INCJan 5, 2026Jan 5, 20261
858127STILAMERI FREIGHT SYSTEMS LLCJan 3, 2024Jan 3, 20241
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jul 19, 2026