Equipment unit · VIN-decoded · NHTSA vPIC

1999 Kenworth T800

1NKDX6EXXXR792541 · Truck · INCOMPLETE VEHICLE
Carriers run under2
31 mo
Inspections6
all-time
OOS inspections2
of 6
First seenAug 24, 2023
WA
Last seenMar 24, 2026
WA
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
1NKDX6EXXXR792541
Make
Kenworth
Model
T800
Model year
1999
Body class
Truck
Vehicle type
INCOMPLETE VEHICLE
GVWR
Class 8: 33,001 lb and above (14,969 kg and above)
Decoded at
Jun 23, 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
1NK

Deterministic · VIN positions 1–3.

Vehicle descriptor section
DX6EX

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
792541

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 · 5 decoded VINs at 100.0% prefix purity.

Model
T800

Prefix basis · 5 decoded VINs at 100.0% prefix purity.

Model line
Not established

No sourced model-line label is established.

No source established for this field.

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
1999

Observed directly for this VIN via NHTSA vPIC.

Observed make
KENWORTH

Observed directly for this VIN via NHTSA vPIC.

Observed model
T800

Observed directly for this VIN via NHTSA vPIC.

Observed body class
Truck

Observed directly for this VIN via NHTSA vPIC.

Observed vehicle type
INCOMPLETE VEHICLE

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

  • model line
  • generation
  • cab type

These are withheld claims, not negative findings.

02

Inspection history

Every roadside inspection of this VIN, newest first · Aug 24, 2023 – Mar 24, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Mar 24, 2026WAIII · Driver-only0OLYMPIC TIMBER OPERATIONS LLC 4477753RP27646/WA
Oct 24, 2024WAII · Walk-around3OOSROGER A LANDBERG JR 2559468HOTDOGS/WA
Jan 15, 2024WAII · Walk-around1ROGER A LANDBERG JR 2559468HOTDOGS/WA
Oct 11, 2023WAI · Full2ROGER A LANDBERG JR 2559468HOTDOGS/WA
Sep 1, 2023WAII · Walk-around2OOSROGER A LANDBERG JR 2559468HOTDOGS/WA
Aug 24, 2023WAIII · Driver-only2ROGER A LANDBERG JR 2559468HOTDOGS/WA
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
OLYMPIC TIMBER OPERATIONS LLC4477753Mar 24, 2026Mar 24, 20261WA
ROGER A LANDBERG JR2559468Aug 24, 2023Oct 24, 20245WA
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.
RP27646WAOLYMPIC TIMBER OPERATIONS LLCMar 24, 2026Mar 24, 20261
HOTDOGSWAROGER A LANDBERG JRAug 24, 2023Oct 24, 20245
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 23, 2026