Equipment unit · VIN-decoded · NHTSA vPIC

2021 Wilson

1W1K54821M6630366 · Trailer · TRAILER
Carriers run under2
24 mo
Inspections5
all-time
OOS inspections1
of 5
First seenApr 9, 2024
CA
Last seenApr 10, 2026
CA
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

VIN
1W1K54821M6630366
Make
Wilson
Model
Wilson
Model year
2021
Body class
Trailer
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Jun 28, 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
1W1

Deterministic · VIN positions 1–3.

Vehicle descriptor section
K5482

Deterministic · VIN positions 4–8.

Check digit
1 · valid

Deterministic · position 9; calculated value 1.

Model year candidates
1991 or 2021

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

North American serial sequence
630366

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
WILSON

Prefix basis · 306 decoded VINs at 100.0% prefix purity.

Model
Wilson

Prefix basis · 306 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
2021

Observed directly for this VIN via NHTSA vPIC.

Observed make
WILSON

Observed directly for this VIN via NHTSA vPIC.

Observed model
Wilson

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 · Apr 9, 2024 – Apr 10, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Apr 10, 2026CAII · Walk-around2JOSE O CASTRO VELASCO 24472764TM1025/CA
Aug 25, 2025CAII · Walk-around1OOSCASTRO FREIGHT LLC 28915924TM1025/CA
Jun 25, 2025CAIII · Driver-only0CASTRO FREIGHT LLC 28915924TM1025/CA
Nov 27, 2024CAI · Full0CASTRO FREIGHT LLC 28915924TM1025/CA
Apr 9, 2024CAI · Full2CASTRO FREIGHT LLC 28915924TM1025/CA
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
JOSE O CASTRO VELASCO2447276Apr 10, 2026Apr 10, 20261CA
CASTRO FREIGHT LLC2891592Apr 9, 2024Aug 25, 20254CA
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.
4TM1025CAJOSE O CASTRO VELASCOApr 10, 2026Apr 10, 20261
4TM1025CACASTRO FREIGHT LLCApr 9, 2024Aug 25, 20254
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 28, 2026