Equipment unit · VIN-decoded · NHTSA vPIC

1DW1A4222AS188401

Not yet decoded
Carriers run under2
24 mo
Inspections2
all-time
OOS inspections2
of 2
First seenJul 19, 2023
TX
Last seenJul 6, 2025
TX
Inspected under 2 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

This VIN has not been decoded yet — the unit's carrier, inspection and plate history below is reconstructed from the FMCSA inspection feed regardless.

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
1A422

Deterministic · VIN positions 4–8.

Check digit
2 · valid

Deterministic · position 9; calculated value 2.

Model year candidates
1980 or 2010

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

North American serial sequence
188401

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 · 18 decoded VINs at 100.0% prefix purity.

Model
Stoughton Trailers

Prefix basis · 18 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 · Jul 19, 2023 – Jul 6, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
Jul 6, 2025TXII · Walk-around10OOSHEARD TRANSPORT SERVICES LLC 3370679191B485/TX
Jul 19, 2023TXII · Walk-around11OOSKDK TRANSPORT LLC 3999385191B485/TX
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
HEARD TRANSPORT SERVICES LLC3370679Jul 6, 2025Jul 6, 20251TX
KDK TRANSPORT LLC3999385Jul 19, 2023Jul 19, 20231TX
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.
191B485TXHEARD TRANSPORT SERVICES LLCJul 6, 2025Jul 6, 20251
191B485TXKDK TRANSPORT LLCJul 19, 2023Jul 19, 20231
Sources: FMCSA SAFER · L&I · NHTSA vPIC