Equipment unit · VIN-decoded · NHTSA vPIC

2011 Dragon Products

1UNST4221BL094444 · Trailer · TRAILER
Carriers run under1
25 mo
Inspections4
all-time
OOS inspections1
of 4
First seenNov 7, 2023
TX
Last seenDec 2, 2025
TX
01

Decoded identity

From the 17-character VIN via NHTSA vPIC

VIN
1UNST4221BL094444
Make
Dragon Products
Model
Dragon Products
Model year
2011
Body class
Trailer
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Jul 8, 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
ST422

Deterministic · VIN positions 4–8.

Check digit
1 · valid

Deterministic · position 9; calculated value 1.

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
094444

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 · Nov 7, 2023 – Dec 2, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
Dec 2, 2025TXII · Walk-around4RAMCO ROUSTABOUT INC 1956458072C421/TX
Mar 5, 2025TXII · Walk-around0RAMCO ROUSTABOUT INC 1956458072C421/TX
Aug 6, 2024TXII · Walk-around1RAMCO ROUSTABOUT INC 1956458072C421/TX
Nov 7, 2023TXII · Walk-around5OOSRAMCO ROUSTABOUT INC 1956458072C421/TX
03

Carriers this unit has run under

1 distinct carrier · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
RAMCO ROUSTABOUT INC1956458Nov 7, 2023Dec 2, 20254TX
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.
072C421TXRAMCO ROUSTABOUT INCNov 7, 2023Dec 2, 20254
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jul 8, 2026