Equipment unit · VIN-decoded · NHTSA vPIC

1981 Kenworth K100

1XKKD29X3BJ290972 · Truck-Tractor · TRUCK
Carriers run under2
27 mo
Inspections6
all-time
OOS inspections4
of 6
First seenDec 26, 2023
TX
Last seenMar 17, 2026
US
Inspected under 2 different carriers in 27 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
1XKKD29X3BJ290972
Make
Kenworth
Model
K100
Model year
1981
Body class
Truck-Tractor
Vehicle type
TRUCK
GVWR
Class 8: 33,001 lb and above (14,969 kg and above)
Decoded at
Jun 24, 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
KD29X

Deterministic · VIN positions 4–8.

Check digit
3 · valid

Deterministic · position 9; calculated value 3.

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
290972

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
1981

Observed directly for this VIN via NHTSA vPIC.

Observed make
KENWORTH

Observed directly for this VIN via NHTSA vPIC.

Observed model
K100

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 · Dec 26, 2023 – Mar 17, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Mar 17, 2026USI · Full22OOSLAURO ROMULO RODRIGUEZ ARREDONDO 237572939EN6S/MX
Oct 23, 2025USI · Full7OOSLAURO ROMULO RODRIGUEZ ARREDONDO 237572939EN6S/MX
May 15, 2025USI · Full11OOSMARTIN HUMBERTO ZAPATA VELAZQUEZ 248707739EN6S/MX
Jan 28, 2025TXIII · Driver-only3MARTIN HUMBERTO ZAPATA VELAZQUEZ 248707739EN6S/MX
Sep 19, 2024USII · Walk-around4OOSMARTIN HUMBERTO ZAPATA VELAZQUEZ 24870771981/MX
Dec 26, 2023TXIII · Driver-only0MARTIN HUMBERTO ZAPATA VELAZQUEZ 248707739EN6S/MX
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
LAURO ROMULO RODRIGUEZ ARREDONDO2375729Oct 23, 2025Mar 17, 20262TA
MARTIN HUMBERTO ZAPATA VELAZQUEZ2487077Dec 26, 2023May 15, 20254TA
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.
39EN6SMXLAURO ROMULO RODRIGUEZ ARREDONDOOct 23, 2025Mar 17, 20262
39EN6SMXMARTIN HUMBERTO ZAPATA VELAZQUEZDec 26, 2023May 15, 20253
1981MXMARTIN HUMBERTO ZAPATA VELAZQUEZSep 19, 2024Sep 19, 20241
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 24, 2026