Equipment unit · VIN-decoded · NHTSA vPIC

2021 Kenworth T680

1XKYD49X2MJ439140 · Truck-Tractor · TRUCK
Carriers run under2
34 mo
Inspections10
all-time
OOS inspections1
of 10
First seenJul 8, 2023
TN
Last seenMay 4, 2026
TN
Inspected under 2 different carriers in 34 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
1XKYD49X2MJ439140
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 19, 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
YD49X

Deterministic · VIN positions 4–8.

Check digit
2 · valid

Deterministic · position 9; calculated value 2.

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
439140

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 · 43,483 decoded VINs at 100.0% prefix purity.

Model
T680

Prefix basis · 43,483 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 8, 2023 – May 4, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
May 4, 2026TNIII · Driver-only1A M TRUCKING INC 1592354W0770HY/TN
Mar 6, 2026TNIII · Driver-only0A M TRUCKING INC 1592354W0770HY/TN
Jan 13, 2026PAII · Walk-around7A M TRUCKING INC 1592354W0770HY/TN
Sep 25, 2025GAIII · Driver-only3OOSA M TRUCKING INC 1592354QXXNMHX/TN
Jan 6, 2025TNI · Full0BIG G EXPRESS INC 580685L4873HY/TN
Dec 27, 2024NCII · Walk-around0BIG G EXPRESS INC 580685L4873HY/TN
Dec 24, 2024GAIII · Driver-only0BIG G EXPRESS INC 580685L4873HY/TN
Dec 16, 2024TNI · Full0BIG G EXPRESS INC 580685L4873HY/TN
Sep 15, 2023KYI · Full3BIG G EXPRESS INC 580685L4873HY/TN
Jul 8, 2023TNIII · Driver-only0BIG G EXPRESS INC 580685L4873HY/TN
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
A M TRUCKING INC1592354Sep 25, 2025May 4, 20264TN
BIG G EXPRESS INC580685Jul 8, 2023Jan 6, 20256TN
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.
W0770HYTNA M TRUCKING INCJan 13, 2026May 4, 20263
QXXNMHXTNA M TRUCKING INCSep 25, 2025Sep 25, 20251
L4873HYTNBIG G EXPRESS INCJul 8, 2023Jan 6, 20256
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 19, 2026