Equipment unit · VIN-decoded · NHTSA vPIC

1999 Stoughton Trailers

1DW1A2816XS296936 · Trailer · TRAILER
Carriers run under3
23 mo
Inspections3
all-time
OOS inspections0
of 3
First seenDec 12, 2023
AZ
Last seenNov 22, 2025
CA
Inspected under 3 different carriers in 23 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
1DW1A2816XS296936
Make
Stoughton Trailers
Model
Stoughton Trailers
Model year
1999
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
1A281

Deterministic · VIN positions 4–8.

Check digit
6 · valid

Deterministic · position 9; calculated value 6.

Model year candidates
1999 or 2029

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

North American serial sequence
296936

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 · 140 decoded VINs at 100.0% prefix purity.

Model
Stoughton Trailers

Prefix basis · 140 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.

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 12, 2023 – Nov 22, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
Nov 22, 2025CAI · Full2—SEMPERFI GROUP CORP 39714994JP2942/CA
Aug 28, 2025CAIII · Driver-only5—2057 TRUCKING LLC 40410234JP2942/CA
Dec 12, 2023AZII · Walk-around4—DUCO GEO SOLUTIONS LLC 24308594JP2942/CA
03

Carriers this unit has run under

3 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
SEMPERFI GROUP CORP3971499Nov 22, 2025Nov 22, 20251CA
2057 TRUCKING LLC4041023Aug 28, 2025Aug 28, 20251CA
DUCO GEO SOLUTIONS LLC2430859Dec 12, 2023Dec 12, 20231AZ
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.
4JP2942CA—SEMPERFI GROUP CORPNov 22, 2025 → Nov 22, 20251
4JP2942CA—2057 TRUCKING LLCAug 28, 2025 → Aug 28, 20251
4JP2942CA—DUCO GEO SOLUTIONS LLCDec 12, 2023 → Dec 12, 20231
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jul 19, 2026