Equipment unit · VIN-decoded · NHTSA vPIC

1999 Kenworth T600

1XKADR9XXXR784856 · Truck-Tractor · TRUCK
Carriers run under3
35 mo
Inspections11
all-time
OOS inspections5
of 11
First seenJul 12, 2023
TX
Last seenJun 3, 2026
TX
Inspected under 3 different carriers in 35 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
1XKADR9XXXR784856
Make
Kenworth
Model
T600
Model year
1999
Body class
Truck-Tractor
Vehicle type
TRUCK
GVWR
Class 8: 33,001 lb and above (14,969 kg and above)
Decoded at
Jun 19, 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
ADR9X

Deterministic · VIN positions 4–8.

Check digit
X · valid

Deterministic · position 9; calculated value X.

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
784856

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
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

  • 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 · Jul 12, 2023 – Jun 3, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Jun 3, 2026TXII · Walk-around0LEOPOLDO ROJAS NAVARRO 42419921N50952/TX
Sep 15, 2025TXI · Full7OOSLEOPOLDO ROJAS NAVARRO 42419921N50952/TX
Sep 3, 2025TXII · Walk-around1OOSLEOPOLDO ROJAS NAVARRO 42419921N50952/TX
Jul 7, 2025TXII · Walk-around4LEOPOLDO ROJAS NAVARRO 42419921N50952/TX
May 30, 2025TXII · Walk-around6LEOPOLDO ROJAS NAVARRO 42419921N50952/TX
May 6, 2025TXII · Walk-around5OOSLEOPOLDO ROJAS NAVARRO 42419921N50952/TX
Mar 14, 2025TXII · Walk-around9OOSLEOPOLDO ROJAS NAVARRO 42419921N50952/TX
Jun 27, 2024TXII · Walk-around7LEOPOLDO ROJAS NAVARRO 42419921N50952/TX
Jun 13, 2024TXII · Walk-around1OOSLEOPOLDO ROJAS NAVARRO 42419921N50952/TX
Oct 6, 2023TXI · Full4TIDEPORT DISTRIBUTING INC 107714R637059/TX
Jul 12, 2023TXII · Walk-around3M C TANK TRANSPORT INC 81405R637059/TX
03

Carriers this unit has run under

3 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
LEOPOLDO ROJAS NAVARRO4241992Jun 13, 2024Jun 3, 20269TX
TIDEPORT DISTRIBUTING INC107714Oct 6, 2023Oct 6, 20231TX
M C TANK TRANSPORT INC81405Jul 12, 2023Jul 12, 20231OH
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.
1N50952TXLEOPOLDO ROJAS NAVARROJun 13, 2024Jun 3, 20269
R637059TXTIDEPORT DISTRIBUTING INCOct 6, 2023Oct 6, 20231
R637059TX1M C TANK TRANSPORT INCJul 12, 2023Jul 12, 20231
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 19, 2026