Equipment unit · VIN-decoded · NHTSA vPIC

2020 Peterbilt 579

1XPBDP9X6LD643678 · Truck-Tractor · TRUCK
Carriers run under3
25 mo
Inspections4
all-time
OOS inspections2
of 4
First seenAug 29, 2023
MI
Last seenSep 15, 2025
IL
Inspected under 3 different carriers in 25 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
1XPBDP9X6LD643678
Make
Peterbilt
Model
579
Model year
2020
Body class
Truck-Tractor
Vehicle type
TRUCK
GVWR
Class 8: 33,001 lb and above (14,969 kg and above)
Decoded at
Jul 12, 2026
vPIC returns make / model / year / body class / GVWR. Fields it does not resolve are shown as Not decoded rather than guessed.
02

Inspection history

Every roadside inspection of this VIN, newest first · Aug 29, 2023 – Sep 15, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
Sep 15, 2025ILII · Walk-around0—QUEST LINER INC 1609038FZ6401/IA
Dec 26, 2024MOII · Walk-around1OOSQUEST LINER INC 1609038FV6837/IA
May 6, 2024PAII · Walk-around4OOSL&T EXPRESS LLC 2844190FV6837/IA
Aug 29, 2023MIIII · Driver-only0—QUANTIX LIQUID TRANSPORTATION INC 328103FV6837/IA
03

Carriers this unit has run under

3 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
QUEST LINER INC1609038Dec 26, 2024Sep 15, 20252IA
L&T EXPRESS LLC2844190May 6, 2024May 6, 20241FL
QUANTIX LIQUID TRANSPORTATION INC328103Aug 29, 2023Aug 29, 20231IL
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.
FZ6401IA—QUEST LINER INCSep 15, 2025 → Sep 15, 20251
FV6837IA—QUEST LINER INCDec 26, 2024 → Dec 26, 20241
FV6837IA—L&T EXPRESS LLCMay 6, 2024 → May 6, 20241
FV6837IA1QUANTIX LIQUID TRANSPORTATION INCAug 29, 2023 → Aug 29, 20231
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jul 12, 2026