Equipment unit · VIN-decoded · NHTSA vPIC

1987 Kenworth T600

1XKAD29X0HJ344085 · Truck-Tractor · TRUCK
T600
Carriers run under2
31 mo
Inspections4
all-time
OOS inspections3
of 4
First seenJun 30, 2023
TX
Last seenJan 20, 2026
TX
Inspected under 2 different carriers in 31 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
1XKAD29X0HJ344085
Make
Kenworth
Model
T600
Model year
1987
Body class
Truck-Tractor
Vehicle type
TRUCK
GVWR
Class 8: 33,001 lb and above (14,969 kg and above)
Decoded at
Jul 9, 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
1XK

Deterministic · VIN positions 1–3.

Vehicle descriptor section
AD29X

Deterministic · VIN positions 4–8.

Check digit
0 · valid

Deterministic · position 9; calculated value 0.

Model year candidates
1987 or 2017

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

North American serial sequence
344085

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.

Make
KENWORTH

Prefix basis · 212 decoded VINs at 92.9% prefix purity.

Model
T6 Series

Prefix basis · 212 decoded VINs at 92.9% prefix purity.

Model line
T600

Sourced label · prefix basis 212 decoded VINs at 92.9% prefix purity.

Generation
Not established

No sourced generation label is established.

No source established for this field.

Cab type
Not established

No sourced cab label is established.

No source established for this field.

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
1987

Observed directly for this VIN via NHTSA vPIC.

Observed make
KENWORTH

Observed directly for this VIN via NHTSA vPIC.

Observed model
T600

Observed directly for this VIN via NHTSA vPIC.

Observed body class
Truck-Tractor

Observed directly for this VIN via NHTSA vPIC.

Observed vehicle type
TRUCK

Observed directly for this VIN via NHTSA vPIC.

GVWR
Class 8: 33,001 lb and above (14,969 kg and above)

Observed directly for this VIN via NHTSA vPIC.

Not established

  • generation
  • cab type

These are withheld claims, not negative findings.

02

Inspection history

Every roadside inspection of this VIN, newest first · Jun 30, 2023 – Jan 20, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Jan 20, 2026TXI · Full4J RAMIREZ CONCRETE LLC 3847760KGY6824/TX
Aug 11, 2025TXII · Walk-around7OOSJ RAMIREZ CONCRETE LLC 3847760KGY6824/TX
Apr 5, 2024TXII · Walk-around7OOSJOSE RAMIREZ 1982747KGY6824/TX
Jun 30, 2023TXII · Walk-around12OOSJOSE RAMIREZ 1982747KGY6824/TX
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
J RAMIREZ CONCRETE LLC3847760Aug 11, 2025Jan 20, 20262TX
JOSE RAMIREZ1982747Jun 30, 2023Apr 5, 20242TX
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.
KGY6824TXJ RAMIREZ CONCRETE LLCAug 11, 2025Jan 20, 20262
KGY6824TXJOSE RAMIREZJun 30, 2023Apr 5, 20242
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jul 9, 2026