Equipment unit · VIN-decoded · NHTSA vPIC

2021 Kenworth T680

1XKYD49X3MJ447571 · Truck-Tractor · TRUCK
Carriers run under2
17 mo
Inspections5
all-time
OOS inspections0
of 5
First seenNov 4, 2024
AZ
Last seenApr 1, 2026
NM
Inspected under 2 different carriers in 17 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
1XKYD49X3MJ447571
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
Jul 10, 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
3 · valid

Deterministic · position 9; calculated value 3.

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
447571

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.

Temporarily unavailable

The platform resolver did not return a reliable response

Deterministic validation above is complete. Platform fields are withheld because an outage is not evidence that the VIN has no known platform.

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

  • platform resolution (temporarily unavailable)

These are withheld claims, not negative findings.

02

Inspection history

Every roadside inspection of this VIN, newest first · Nov 4, 2024 – Apr 1, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Apr 1, 2026NMIII · Driver-only0—MKK TRUCKING LLC 4431739AN02431/AZ
Mar 3, 2026NMII · Walk-around0—MKK TRUCKING LLC 4431739AN02431/AZ
Dec 18, 2025NMIII · Driver-only0—MKK TRUCKING LLC 4431739AN02431/AZ
Feb 25, 2025CAI · Full1—ALLIANCE EXPRESS TRANSPORTATION LLC 4063724AM56480/AZ
Nov 4, 2024AZII · Walk-around4—ALLIANCE EXPRESS TRANSPORTATION LLC 4063724AM56480/AZ
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
MKK TRUCKING LLC4431739Dec 18, 2025Apr 1, 20263AZ
ALLIANCE EXPRESS TRANSPORTATION LLC4063724Nov 4, 2024Feb 25, 20252AZ
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.
AN02431AZ1MKK TRUCKING LLCDec 18, 2025 → Apr 1, 20263
AM56480AZ—ALLIANCE EXPRESS TRANSPORTATION LLCNov 4, 2024 → Feb 25, 20252
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jul 10, 2026