Equipment unit · VIN-decoded · NHTSA vPIC

2012 Dragon Products

1UNST4422CS099978 · Trailer · TRAILER
Carriers run under1
32 mo
Inspections9
all-time
OOS inspections4
of 9
First seenJul 27, 2023
TX
Last seenMar 10, 2026
TX
01

Decoded identity

From the 17-character VIN via NHTSA vPIC

VIN
1UNST4422CS099978
Make
Dragon Products
Model
Dragon Products
Model year
2012
Body class
Trailer
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Jun 19, 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
2 · valid

Deterministic · position 9; calculated value 2.

Model year candidates
1982 or 2012

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

North American serial sequence
099978

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
2012

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 27, 2023 – Mar 10, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Mar 10, 2026TXII · Walk-around2KNOWLES TRUCKING LLC 12460648162JQ/OK
Jan 15, 2026TXII · Walk-around3OOSKNOWLES TRUCKING LLC 12460648162JQ/OK
Mar 8, 2025TXII · Walk-around1KNOWLES TRUCKING LLC 12460648162JQ/OK
Jan 20, 2025TXII · Walk-around0KNOWLES TRUCKING LLC 12460648162JQ/OK
Aug 8, 2024TXI · Full7OOSKNOWLES TRUCKING LLC 12460648162JQ/OK
Jul 24, 2024TXII · Walk-around4OOSKNOWLES TRUCKING LLC 12460648162JQ/OK
Mar 22, 2024TXII · Walk-around0KNOWLES TRUCKING LLC 12460648162JQ/OK
Oct 24, 2023TXII · Walk-around9OOSKNOWLES TRUCKING LLC 1246064BQ5502/OK
Jul 27, 2023TXII · Walk-around4KNOWLES TRUCKING LLC 12460648162JQ/OK
03

Carriers this unit has run under

1 distinct carrier · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
KNOWLES TRUCKING LLC1246064Jul 27, 2023Mar 10, 20269OK
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.
8162JQOKKNOWLES TRUCKING LLCJul 27, 2023Mar 10, 20268
BQ5502OKKNOWLES TRUCKING LLCOct 24, 2023Oct 24, 20231
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 19, 2026