Equipment unit · VIN-decoded · NHTSA vPIC

2021 Kenworth T680

1XKYDP9X3MJ448771 · Truck-Tractor · TRUCK
Carriers run under2
36 mo
Inspections17
all-time
OOS inspections2
of 17
First seenJul 19, 2023
NM
Last seenJul 21, 2026
TX
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
1XKYDP9X3MJ448771
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 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
1XK

Deterministic · VIN positions 1–3.

Vehicle descriptor section
YDP9X

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
448771

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 · 26,022 decoded VINs at 100.0% prefix purity.

Model
T680

Prefix basis · 26,022 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 19, 2023 – Jul 21, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Jul 21, 2026TXII · Walk-around2AMBAS FRONTERAS SERVICIOS DE TRANSPORTE S DE RL DE CV 389808629ES8X/MX
Jun 24, 2026USIII · Driver-only1AMBAS FRONTERAS SERVICIOS DE TRANSPORTE S DE RL DE CV 389808629ES8X/MX
Jun 11, 2026USIII · Driver-only1AMBAS FRONTERAS SERVICIOS DE TRANSPORTE S DE RL DE CV 389808629ES8X/MX
May 29, 2026TXII · Walk-around2AMBAS FRONTERAS SERVICIOS DE TRANSPORTE S DE RL DE CV 389808629ES8X/MX
May 27, 2026TXII · Walk-around1AMBAS FRONTERAS SERVICIOS DE TRANSPORTE S DE RL DE CV 389808629ES8X/MX
May 19, 2026USI · Full0AMBAS FRONTERAS SERVICIOS DE TRANSPORTE S DE RL DE CV 389808629ES8X/MX
May 18, 2026USIII · Driver-only0AMBAS FRONTERAS SERVICIOS DE TRANSPORTE S DE RL DE CV 389808629ES8X/MX
May 12, 2026USI · Full3OOSAMBAS FRONTERAS SERVICIOS DE TRANSPORTE S DE RL DE CV 389808629ES8X/MX
May 11, 2026USI · Full4OOSAMBAS FRONTERAS SERVICIOS DE TRANSPORTE S DE RL DE CV 389808629ES8X/MX
Jul 5, 2025TXII · Walk-around4STELLAR SIX LLC 3118166R490322/TX
Jun 12, 2025NMI · Full0STELLAR SIX LLC 3118166R490322/TX
Jan 20, 2025NMI · Full0STELLAR SIX LLC 3118166R490322/TX
Feb 27, 2024UTI · Full2STELLAR SIX LLC 3118166R490322/TX
Nov 15, 2023NMI · Full0STELLAR SIX LLC 3118166R490322/TX
Nov 3, 2023NMII · Walk-around1STELLAR SIX LLC 3118166R490322/TX
Sep 29, 2023NMIII · Driver-only0STELLAR SIX LLC 3118166R490322/TX
Jul 19, 2023NMIII · Driver-only1STELLAR SIX LLC 3118166R490322/TX
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
AMBAS FRONTERAS SERVICIOS DE TRANSPORTE S DE RL DE CV3898086May 11, 2026Jul 21, 20269CI
STELLAR SIX LLC3118166Jul 19, 2023Jul 5, 20258TX
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.
29ES8XMX1AMBAS FRONTERAS SERVICIOS DE TRANSPORTE S DE RL DE CVMay 11, 2026Jul 21, 20269
R490322TXSTELLAR SIX LLCJul 19, 2023Jul 5, 20258
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 16, 2026