Equipment unit · VIN-decoded · NHTSA vPIC

2011 Dragon Products

1UNST4420BS093109 · Trailer · TRAILER
Carriers run under1
35 mo
Inspections7
all-time
OOS inspections5
of 7
First seenJul 7, 2023
TX
Last seenJun 23, 2026
TX
01

Decoded identity

From the 17-character VIN via NHTSA vPIC

VIN
1UNST4420BS093109
Make
Dragon Products
Model
Dragon Products
Model year
2011
Body class
Trailer
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Jun 23, 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
1UN

Deterministic · VIN positions 1–3.

Vehicle descriptor section
ST442

Deterministic · VIN positions 4–8.

Check digit
0 · valid

Deterministic · position 9; calculated value 0.

Model year candidates
1981 or 2011

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

North American serial sequence
093109

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.

Not established

No supported platform claim is established for this prefix

The resolver answered successfully but returned no row above the evidence floor. This does not mean the vehicle has no platform or that no data exists; it means this store cannot make the claim.

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
2011

Observed directly for this VIN via NHTSA vPIC.

Observed make
DRAGON PRODUCTS

Observed directly for this VIN via NHTSA vPIC.

Observed model
Dragon Products

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

  • platform make
  • platform model
  • model line
  • generation
  • cab type

These are withheld claims, not negative findings.

02

Inspection history

Every roadside inspection of this VIN, newest first · Jul 7, 2023 – Jun 23, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Jun 23, 2026TXII · Walk-around1KNOWLES TRUCKING LLC 1246064TP543/ID
Jun 14, 2026TXII · Walk-around4OOSKNOWLES TRUCKING LLC 1246064TP543/ID
May 7, 2026TXII · Walk-around8OOSKNOWLES TRUCKING LLC 1246064TP543/ID
Apr 16, 2026TXII · Walk-around1OOSKNOWLES TRUCKING LLC 1246064TP543/ID
Jan 21, 2026TXII · Walk-around5KNOWLES TRUCKING LLC 1246064TP543/ID
Dec 20, 2025TXII · Walk-around5OOSKNOWLES TRUCKING LLC 1246064TP543/ID
Jul 7, 2023TXII · Walk-around5OOSKNOWLES TRUCKING LLC 124606487P162M/TX
03

Carriers this unit has run under

1 distinct carrier · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
KNOWLES TRUCKING LLC1246064Jul 7, 2023Jun 23, 20267OK
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.
TP543ID2KNOWLES TRUCKING LLCDec 20, 2025Jun 23, 20266
87P162MTXKNOWLES TRUCKING LLCJul 7, 2023Jul 7, 20231
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 23, 2026