Equipment unit · VIN-decoded · NHTSA vPIC

2013 Dragon Products

1UNST4423DS128003 · Trailer · TRAILER
Carriers run under2
12 mo
Inspections5
all-time
OOS inspections0
of 5
First seenMar 12, 2024
AZ
Last seenMar 6, 2025
CA
Inspected under 2 different carriers in 12 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
1UNST4423DS128003
Make
Dragon Products
Model
Dragon Products
Model year
2013
Body class
Trailer
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Jun 28, 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
3 · valid

Deterministic · position 9; calculated value 3.

Model year candidates
1983 or 2013

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

North American serial sequence
128003

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
2013

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 · Mar 12, 2024 – Mar 6, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
Mar 6, 2025CAII · Walk-around1SOUTHBAY TRANSPORT INC 1837973P163379/CA
Dec 16, 2024USII · Walk-around1SOUTHBAY TRANSPORT INC 1837973P163379/CA
Oct 24, 2024CAI · Full0SOUTHBAY TRANSPORT INC 18379734VZ1315/CA
Mar 19, 2024NMII · Walk-around0SOUTHBAY TRANSPORT INC 1837973P163379/CA
Mar 12, 2024AZII · Walk-around7WILLIAMS IGNACIO NARCIA LEON 3089559P163379/CA
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
SOUTHBAY TRANSPORT INC1837973Mar 19, 2024Mar 6, 20254CA
WILLIAMS IGNACIO NARCIA LEON3089559Mar 12, 2024Mar 12, 20241SO
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.
P163379CASOUTHBAY TRANSPORT INCMar 19, 2024Mar 6, 20253
4VZ1315CASOUTHBAY TRANSPORT INCOct 24, 2024Oct 24, 20241
P163379CAWILLIAMS IGNACIO NARCIA LEONMar 12, 2024Mar 12, 20241
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 28, 2026