Equipment unit · VIN-decoded · NHTSA vPIC

1999 Dynaweld, Inc.

4U181DHX2X1X36983 · TRAILER
Carriers run under4
21 mo
Inspections5
all-time
OOS inspections3
of 5
First seenSep 20, 2023
AZ
Last seenJun 24, 2025
US
Inspected under 4 different carriers in 21 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
4U181DHX2X1X36983
Make
Dynaweld, Inc.
Model
Not decoded
Model year
1999
Body class
Not decoded
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Aug 7, 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
4U1

Deterministic · VIN positions 1–3.

Vehicle descriptor section
81DHX

Deterministic · VIN positions 4–8.

Check digit
2 · valid

Deterministic · position 9; calculated value 2.

Model year candidates
1999 or 2029

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

North American serial sequence
X36983

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
1999

Observed directly for this VIN via NHTSA vPIC.

Observed make
DYNAWELD, INC.

Observed directly for this VIN via NHTSA vPIC.

Observed model
Not established

Observed directly for this VIN via NHTSA vPIC.

Observed body class
Not established

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 20, 2023 – Jun 24, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
Jun 24, 2025USI · Full23OOSOSVALDO VEGA DIAZ 3073462W20298/AZ
Sep 3, 2024AZIII · Driver-only0VEGA TRUCKIN LLC 4183629W20298/AZ
Jul 11, 2024COII · Walk-around6OOSVEGA TRUCKIN LLC 4183629W20298/AZ
Nov 17, 2023AZIII · Driver-only0NOEL OLEGARIO IRIARTE VICENTE 3254688W20298/AZ
Sep 20, 2023AZIII · Driver-only4OOSANA ELIZABETH IRIARTE VICENTE 3728669W20298/AZ
03

Carriers this unit has run under

4 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
OSVALDO VEGA DIAZ3073462Jun 24, 2025Jun 24, 20251SO
VEGA TRUCKIN LLC4183629Jul 11, 2024Sep 3, 20242AZ
NOEL OLEGARIO IRIARTE VICENTE3254688Nov 17, 2023Nov 17, 20231SO
ANA ELIZABETH IRIARTE VICENTE3728669Sep 20, 2023Sep 20, 20231SO
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.
W20298AZOSVALDO VEGA DIAZJun 24, 2025Jun 24, 20251
W20298AZVEGA TRUCKIN LLCJul 11, 2024Sep 3, 20242
W20298AZNOEL OLEGARIO IRIARTE VICENTENov 17, 2023Nov 17, 20231
W20298AZANA ELIZABETH IRIARTE VICENTESep 20, 2023Sep 20, 20231
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Aug 7, 2026