Equipment unit · VIN-decoded · NHTSA vPIC

2020 Western Trailer Company

5DN144821LB001549 · Trailer · TRAILER
Carriers run under2
7 mo
Inspections5
all-time
OOS inspections1
of 5
First seenMar 6, 2025
CA
Last seenOct 29, 2025
CA
Inspected under 2 different carriers in 7 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
5DN144821LB001549
Make
Western Trailer Company
Model
Western Trailer Company
Model year
2020
Body class
Trailer
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Jul 1, 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
5DN

Deterministic · VIN positions 1–3.

Vehicle descriptor section
14482

Deterministic · VIN positions 4–8.

Check digit
1 · valid

Deterministic · position 9; calculated value 1.

Model year candidates
1990 or 2020

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

North American serial sequence
001549

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
WESTERN TRAILER COMPANY

Prefix basis · 133 decoded VINs at 100.0% prefix purity.

Model
Western Trailer Company

Prefix basis · 133 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
2020

Observed directly for this VIN via NHTSA vPIC.

Observed make
WESTERN TRAILER COMPANY

Observed directly for this VIN via NHTSA vPIC.

Observed model
Western Trailer Company

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 · Mar 6, 2025 – Oct 29, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
Oct 29, 2025CAI · Full2JDR TRUCKING INC 30561094SW7238/CA
Sep 26, 2025CAII · Walk-around0JDR TRUCKING INC 30561094SW7238/CA
Sep 10, 2025CAII · Walk-around3OOSJDR TRUCKING INC 30561094SW7238/CA
Jun 17, 2025CAIII · Driver-only0J D PISTON INC 37860724SW7238/CA
Mar 6, 2025CAIII · Driver-only0JDR TRUCKING INC 30561094SW7238/CA
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
JDR TRUCKING INC3056109Mar 6, 2025Oct 29, 20254CA
J D PISTON INC3786072Jun 17, 2025Jun 17, 20251CA
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.
4SW7238CAJDR TRUCKING INCMar 6, 2025Oct 29, 20254
4SW7238CAJ D PISTON INCJun 17, 2025Jun 17, 20251
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jul 1, 2026