Equipment unit · VIN-decoded · NHTSA vPIC

2021 Kenworth T880

1XKZD40X1MJ441057 · Truck-Tractor · TRUCK
Carriers run under2
36 mo
Inspections8
all-time
OOS inspections1
of 8
First seenJul 19, 2023
AK
Last seenJul 14, 2026
AK
Inspected under 2 different carriers in 36 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
1XKZD40X1MJ441057
Make
Kenworth
Model
T880
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 21, 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
ZD40X

Deterministic · VIN positions 4–8.

Check digit
1 · valid

Deterministic · position 9; calculated value 1.

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
441057

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 · 915 decoded VINs at 100.0% prefix purity.

Model
T880

Prefix basis · 915 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
T880

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 19, 2023 – Jul 14, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Jul 14, 2026AKI · Full0MASS EXCAVATION INC 4336532JSA498/AK
Jul 25, 2025AKIII · Driver-only1DAVIS CONSTRUCTORS & ENGINEERS INC 1658883JSA498/AK
Dec 27, 2024AKIII · Driver-only1DAVIS CONSTRUCTORS & ENGINEERS INC 1658883JSA498/AK
Jul 23, 2024AKII · Walk-around3OOSDAVIS CONSTRUCTORS & ENGINEERS INC 1658883JSA498/AK
Jun 20, 2024AKII · Walk-around3DAVIS CONSTRUCTORS & ENGINEERS INC 1658883JSA498/AK
Jan 10, 2024AKIII · Driver-only1DAVIS CONSTRUCTORS & ENGINEERS INC 1658883JSA498/AK
Jul 25, 2023AKIII · Driver-only1DAVIS CONSTRUCTORS & ENGINEERS INC 1658883JSA498/AK
Jul 19, 2023AKII · Walk-around0DAVIS CONSTRUCTORS & ENGINEERS INC 1658883JSA498/AK
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
MASS EXCAVATION INC4336532Jul 14, 2026Jul 14, 20261AK
DAVIS CONSTRUCTORS & ENGINEERS INC1658883Jul 19, 2023Jul 25, 20257AK
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.
JSA498AK1MASS EXCAVATION INCJul 14, 2026Jul 14, 20261
JSA498AKDAVIS CONSTRUCTORS & ENGINEERS INCJul 19, 2023Jul 25, 20257
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 21, 2026