Equipment unit · VIN-decoded · NHTSA vPIC

2021 Kenworth T680

1XKYDP9X6MJ437019 · Truck-Tractor · TRUCK
Carriers run under3
22 mo
Inspections6
all-time
OOS inspections2
of 6
First seenJul 31, 2024
MI
Last seenMay 27, 2026
CA
Inspected under 3 different carriers in 22 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
1XKYDP9X6MJ437019
Make
Kenworth
Model
T680
Model year
2021
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
YDP9X

Deterministic · VIN positions 4–8.

Check digit
6 · valid

Deterministic · position 9; calculated value 6.

Model year candidates
1991 or 2021

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

North American serial sequence
437019

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 · 26,022 decoded VINs at 100.0% prefix purity.

Model
T680

Prefix basis · 26,022 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
2021

Observed directly for this VIN via NHTSA vPIC.

Observed make
KENWORTH

Observed directly for this VIN via NHTSA vPIC.

Observed model
T680

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

  • model line
  • generation
  • cab type

These are withheld claims, not negative findings.

02

Inspection history

Every roadside inspection of this VIN, newest first · Jul 31, 2024 – May 27, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
May 27, 2026CAII · Walk-around2OOSRUDOLPH FREIGHT SYSTEMS INC 468962J5481HY/TN
Feb 27, 2026VAII · Walk-around0RUDOLPH FREIGHT SYSTEMS INC 468962J5481HY/TN
May 5, 2025MTII · Walk-around2OOSMERCER TRANSPORTATION COMPANY INC 1547123771747/IN
Feb 4, 2025MTI · Full0MERCER TRANSPORTATION COMPANY INC 1547123771747/IN
Jan 21, 2025NMIII · Driver-only0MERCER TRANSPORTATION COMPANY INC 1547123771747/IN
Jul 31, 2024MIIII · Driver-only1HEARTLAND EXPRESS INC OF IOWA 134697DH3691/IA
03

Carriers this unit has run under

3 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
RUDOLPH FREIGHT SYSTEMS INC468962Feb 27, 2026May 27, 20262TN
MERCER TRANSPORTATION COMPANY INC154712Jan 21, 2025May 5, 20253KY
HEARTLAND EXPRESS INC OF IOWA134697Jul 31, 2024Jul 31, 20241IA
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.
J5481HYTNRUDOLPH FREIGHT SYSTEMS INCFeb 27, 2026May 27, 20262
3771747INMERCER TRANSPORTATION COMPANY INCJan 21, 2025May 5, 20253
DH3691IAHEARTLAND EXPRESS INC OF IOWAJul 31, 2024Jul 31, 20241
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 24, 2026