Equipment unit · VIN-decoded · NHTSA vPIC

2025 Kenworth T880

1NKZX4TX2SJ179978 · Truck · INCOMPLETE VEHICLE
Carriers run under2
15 mo
Inspections3
all-time
OOS inspections1
of 3
First seenMay 22, 2025
SC
Last seenAug 9, 2026
WI
Inspected under 2 different carriers in 15 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
1NKZX4TX2SJ179978
Make
Kenworth
Model
T880
Model year
2025
Body class
Truck
Vehicle type
INCOMPLETE VEHICLE
GVWR
Class 8: 33,001 lb and above (14,969 kg and above)
Decoded at
Aug 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
ZX4TX

Deterministic · VIN positions 4–8.

Check digit
2 · valid

Deterministic · position 9; calculated value 2.

Model year candidates
1995 or 2025

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

North American serial sequence
179978

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 · 2,638 decoded VINs at 100.0% prefix purity.

Model
T880

Prefix basis · 2,638 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
2025

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 · May 22, 2025 – Aug 9, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Aug 9, 2026WIIII · Driver-only4OOSGULF STAR LOGISTICS LLC 44919131221536/WI
Apr 20, 2026ALIII · Driver-only0GULF STAR LOGISTICS LLC 44919131230873/AL
May 22, 2025SCIII · Driver-only1EXTREME ENTERPRISES INCORPORATED 17368531221536/AL
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
GULF STAR LOGISTICS LLC4491913Apr 20, 2026Aug 9, 20262AL
EXTREME ENTERPRISES INCORPORATED1736853May 22, 2025May 22, 20251SC
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.
1221536WI1GULF STAR LOGISTICS LLCAug 9, 2026Aug 9, 20261
1230873ALGULF STAR LOGISTICS LLCApr 20, 2026Apr 20, 20261
1221536ALEXTREME ENTERPRISES INCORPORATEDMay 22, 2025May 22, 20251
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Aug 16, 2026