Equipment unit · VIN-decoded · NHTSA vPIC

1987 Kenworth T600

1XKADP9X6HJ135155 · Truck-Tractor · TRUCK
T600
Carriers run under2
29 mo
Inspections16
all-time
OOS inspections4
of 16
First seenFeb 20, 2024
CA
Last seenJul 30, 2026
WA
Inspected under 2 different carriers in 29 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
1XKADP9X6HJ135155
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
Jun 17, 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
ADP9X

Deterministic · VIN positions 4–8.

Check digit
6 · valid

Deterministic · position 9; calculated value 6.

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
135155

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 · 1,080 decoded VINs at 93.3% prefix purity.

Model
T6 Series

Prefix basis · 1,080 decoded VINs at 93.3% prefix purity.

Model line
T600

Sourced label · prefix basis 1,080 decoded VINs at 93.3% 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 · Feb 20, 2024 – Jul 30, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Jul 30, 2026WAII · Walk-around2SILICON LOGISTICS INC 1573492WP72909/CA
Jul 2, 2026CAI · Full2OOSSILICON LOGISTICS INC 1573492WP72909/CA
Jun 30, 2026CAII · Walk-around0SILICON LOGISTICS INC 1573492WP72909/CA
Jun 15, 2026CAII · Walk-around0SILICON LOGISTICS INC 1573492WP72909/CA
May 28, 2026CAII · Walk-around1OOSSILICON ROADWAYS INC 892706WP72909/CA
Apr 12, 2026CAII · Walk-around1OOSSILICON ROADWAYS INC 892706WP72909/CA
Jan 18, 2026CAI · Full3SILICON ROADWAYS INC 892706WP72909/CA
Nov 6, 2025CAII · Walk-around0SILICON ROADWAYS INC 892706WP72909/CA
Oct 8, 2025WAIII · Driver-only0SILICON ROADWAYS INC 892706WP72909/CA
Jul 15, 2025CAII · Walk-around0SILICON ROADWAYS INC 892706WP72909/CA
May 28, 2025CAII · Walk-around0SILICON ROADWAYS INC 892706WP72909/CA
Apr 29, 2025WAIII · Driver-only1SILICON ROADWAYS INC 892706WP72909/CA
Oct 16, 2024CAI · Full0SILICON ROADWAYS INC 892706WP72909/CA
Jun 20, 2024CAI · Full0SILICON ROADWAYS INC 892706WP72909/CA
Apr 5, 2024WAI · Full6OOSSILICON ROADWAYS INC 892706WP72909/CA
Feb 20, 2024CAII · Walk-around0SILICON ROADWAYS INC 892706WP72909/CA
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
SILICON LOGISTICS INC1573492Jun 15, 2026Jul 30, 20264CA
SILICON ROADWAYS INC892706Feb 20, 2024May 28, 202612CA
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.
WP72909CA1SILICON LOGISTICS INCJun 15, 2026Jul 30, 20264
WP72909CASILICON ROADWAYS INCFeb 20, 2024May 28, 202612
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 17, 2026