Equipment unit · VIN-decoded · NHTSA vPIC

2011 Dragon Products

1UNST4220BL081751 · Trailer · TRAILER
Carriers run under4
20 mo
Inspections4
all-time
OOS inspections2
of 4
First seenSep 5, 2023
TX
Last seenMay 15, 2025
TX
Inspected under 4 different carriers in 20 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
1UNST4220BL081751
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
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
081751

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 · Sep 5, 2023 – May 15, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
May 15, 2025TXI · Full13OOSROYAL T ENERGY LLC 1995304242B799/TX
Apr 8, 2025NMII · Walk-around6OOSL SEY TRANSPORT LLC 40861519933FTK/NM
Jan 25, 2024NMII · Walk-around4A S ENERGY LLC 36630389933FTK/NM
Sep 5, 2023TXII · Walk-around0HC CARRIERS LLC 311413810U253M/TX
03

Carriers this unit has run under

4 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
ROYAL T ENERGY LLC1995304May 15, 2025May 15, 20251TX
L SEY TRANSPORT LLC4086151Apr 8, 2025Apr 8, 20251NM
A S ENERGY LLC3663038Jan 25, 2024Jan 25, 20241NM
HC CARRIERS LLC3114138Sep 5, 2023Sep 5, 20231TX
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.
242B799TXROYAL T ENERGY LLCMay 15, 2025May 15, 20251
9933FTKNML SEY TRANSPORT LLCApr 8, 2025Apr 8, 20251
9933FTKNMA S ENERGY LLCJan 25, 2024Jan 25, 20241
10U253MTXHC CARRIERS LLCSep 5, 2023Sep 5, 20231
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jul 8, 2026