Equipment unit · VIN-decoded · NHTSA vPIC

2021 Kenworth T880

1NKZL40X5MJ470638 · Truck · INCOMPLETE VEHICLE
Carriers run under2
28 mo
Inspections17
all-time
OOS inspections2
of 17
First seenOct 3, 2023
MD
Last seenFeb 12, 2026
MD
Inspected under 2 different carriers in 28 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
1NKZL40X5MJ470638
Make
Kenworth
Model
T880
Model year
2021
Body class
Truck
Vehicle type
INCOMPLETE VEHICLE
GVWR
Class 8: 33,001 lb and above (14,969 kg and above)
Decoded at
Jun 16, 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
1NK

Deterministic · VIN positions 1–3.

Vehicle descriptor section
ZL40X

Deterministic · VIN positions 4–8.

Check digit
5 · valid

Deterministic · position 9; calculated value 5.

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
470638

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 · 968 decoded VINs at 100.0% prefix purity.

Model
T880

Prefix basis · 968 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

Observed directly for this VIN via NHTSA vPIC.

Observed vehicle type
INCOMPLETE VEHICLE

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 · Oct 3, 2023 – Feb 12, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Feb 12, 2026MDII · Walk-around0MILLER ENVIRONMENTAL GROUP INC 239798352ED11/MD
Jan 20, 2026PAIII · Driver-only1MILLER ENVIRONMENTAL GROUP INC 239798352ED11/MD
Jan 8, 2026MDII · Walk-around2MILLER ENVIRONMENTAL GROUP INC 239798352ED11/MD
Oct 1, 2025PAII · Walk-around2OOSACE ENVIRONMENTAL HOLDINGS LLC 3199371352ED11/MD
Aug 13, 2025MDI · Full0ACE ENVIRONMENTAL HOLDINGS LLC 3199371352ED11/MD
Apr 30, 2025MDII · Walk-around3ACE ENVIRONMENTAL HOLDINGS LLC 3199371352ED11/MD
Feb 25, 2025MDII · Walk-around1OOSACE ENVIRONMENTAL HOLDINGS LLC 3199371352ED11/MD
Oct 21, 2024MDII · Walk-around0ACE ENVIRONMENTAL HOLDINGS LLC 3199371352ED11/MD
Oct 15, 2024MDII · Walk-around0ACE ENVIRONMENTAL HOLDINGS LLC 3199371352ED11/MD
Jul 31, 2024MDII · Walk-around0ACE ENVIRONMENTAL HOLDINGS LLC 3199371352ED11/MD
Jul 24, 2024MDI · Full2ACE ENVIRONMENTAL HOLDINGS LLC 3199371352ED11/MD
Jun 12, 2024MDII · Walk-around0ACE ENVIRONMENTAL HOLDINGS LLC 3199371352ED11/MD
Jun 6, 2024VAIII · Driver-only1ACE ENVIRONMENTAL HOLDINGS LLC 3199371352ED11/MD
Apr 29, 2024MDII · Walk-around0ACE ENVIRONMENTAL HOLDINGS LLC 3199371352ED11/MD
Apr 8, 2024PAII · Walk-around0ACE ENVIRONMENTAL HOLDINGS LLC 3199371352ED11/MD
Dec 28, 2023PAI · Full2ACE ENVIRONMENTAL HOLDINGS LLC 3199371352ED11/MD
Oct 3, 2023MDII · Walk-around0ACE ENVIRONMENTAL HOLDINGS LLC 3199371352ED11/MD
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
MILLER ENVIRONMENTAL GROUP INC239798Jan 8, 2026Feb 12, 20263NY
ACE ENVIRONMENTAL HOLDINGS LLC3199371Oct 3, 2023Oct 1, 202514MD
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.
352ED11MD1MILLER ENVIRONMENTAL GROUP INCJan 8, 2026Feb 12, 20263
352ED11MDACE ENVIRONMENTAL HOLDINGS LLCOct 3, 2023Oct 1, 202514
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 16, 2026