Equipment unit · VIN-decoded · NHTSA vPIC

2015 Stoughton Trailers

1DW1A5326FB598601 · Trailer · TRAILER
Carriers run under3
33 mo
Inspections6
all-time
OOS inspections3
of 6
First seenAug 18, 2023
CA
Last seenMay 26, 2026
LA
Inspected under 3 different carriers in 33 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
1DW1A5326FB598601
Make
Stoughton Trailers
Model
Stoughton Trailers
Model year
2015
Body class
Trailer
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Jun 22, 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
6 · valid

Deterministic · position 9; calculated value 6.

Model year candidates
1985 or 2015

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

North American serial sequence
598601

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
2015

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 · Aug 18, 2023 – May 26, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
May 26, 2026LAI · Full7OOSG S W TRANSPORT INC 38704494XD5986/CA
Nov 20, 2025ALII · Walk-around5AULAKH ROADLINE INC 41152064XD5986/CA
Dec 14, 2024CAII · Walk-around3OOSFOCUS TRUCKING INC 32073084PM6900/CA
Mar 3, 2024CAII · Walk-around3OOSFOCUS TRUCKING INC 32073084PM6900/CA
Dec 4, 2023CAI · Full0FOCUS TRUCKING INC 32073084PM6900/CA
Aug 18, 2023CAIII · Driver-only1FOCUS TRUCKING INC 32073084PM6900/CA
03

Carriers this unit has run under

3 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
G S W TRANSPORT INC3870449May 26, 2026May 26, 20261CA
AULAKH ROADLINE INC4115206Nov 20, 2025Nov 20, 20251CA
FOCUS TRUCKING INC3207308Aug 18, 2023Dec 14, 20244CA
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.
4XD5986CAG S W TRANSPORT INCMay 26, 2026May 26, 20261
4XD5986CAAULAKH ROADLINE INCNov 20, 2025Nov 20, 20251
4PM6900CAFOCUS TRUCKING INCAug 18, 2023Dec 14, 20244
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 22, 2026