Equipment unit · VIN-decoded · NHTSA vPIC

2011 Kenworth T6 Series

1XKAD49X1BJ279847 · Truck-Tractor · TRUCK
T600
Carriers run under3
29 mo
Inspections4
all-time
OOS inspections2
of 4
First seenFeb 22, 2024
TX
Last seenJul 24, 2026
TX
Inspected under 3 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
1XKAD49X1BJ279847
Make
Kenworth
Model
T6 Series
Model year
2011
Body class
Truck-Tractor
Vehicle type
TRUCK
GVWR
Class 8: 33,001 lb and above (14,969 kg and above)
Decoded at
Jul 26, 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
AD49X

Deterministic · VIN positions 4–8.

Check digit
1 · valid

Deterministic · position 9; calculated value 1.

Model year candidates
1981 or 2011

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

North American serial sequence
279847

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 · 5,142 decoded VINs at 90.1% prefix purity.

Model
T6 Series

Prefix basis · 5,142 decoded VINs at 90.1% prefix purity.

Model line
T600

Sourced label · prefix basis 5,142 decoded VINs at 90.1% 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
2011

Observed directly for this VIN via NHTSA vPIC.

Observed make
KENWORTH

Observed directly for this VIN via NHTSA vPIC.

Observed model
T6 Series

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 22, 2024 – Jul 24, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Jul 24, 2026TXII · Walk-around5J VAZQUEZ CARRIERS LLC 36569431P19806/TX
May 8, 2026TXII · Walk-around4OOSKNOWLES TRUCKING LLC 124606419P728N/TX
Mar 30, 2026TXII · Walk-around6OOSKNOWLES TRUCKING LLC 1246064TMP53DLN/TX
Feb 22, 2024TXII · Walk-around1JOSE ANGEL ALFARO 41699581M64519/TX
03

Carriers this unit has run under

3 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
J VAZQUEZ CARRIERS LLC3656943Jul 24, 2026Jul 24, 20261TX
KNOWLES TRUCKING LLC1246064Mar 30, 2026May 8, 20262OK
JOSE ANGEL ALFARO4169958Feb 22, 2024Feb 22, 20241TX
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.
1P19806TX1J VAZQUEZ CARRIERS LLCJul 24, 2026Jul 24, 20261
19P728NTXKNOWLES TRUCKING LLCMay 8, 2026May 8, 20261
TMP53DLNTXKNOWLES TRUCKING LLCMar 30, 2026Mar 30, 20261
1M64519TXJOSE ANGEL ALFAROFeb 22, 2024Feb 22, 20241
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jul 26, 2026