Equipment unit · VIN-decoded · NHTSA vPIC

2021 Peterbilt 579

1XPBDP9X4MD742887 · Truck-Tractor · TRUCK
Carriers run under2
37 mo
Inspections3
all-time
OOS inspections1
of 3
First seenJun 12, 2023
IN
Last seenJul 16, 2026
LA
Inspected under 2 different carriers in 37 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
1XPBDP9X4MD742887
Make
Peterbilt
Model
579
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
Jul 31, 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 · Jun 12, 2023 – Jul 16, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Jul 16, 2026LAI · Full0—HAYNES MOTOR LINES LLC 77755Z845252/LA
Feb 29, 2024MIII · Walk-around1OOSPAM TRANSPORT INC 1797523108046/IN
Jun 12, 2023INII · Walk-around0—PAM TRANSPORT INC 1797523108046/IN
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
HAYNES MOTOR LINES LLC77755Jul 16, 2026Jul 16, 20261LA
PAM TRANSPORT INC179752Jun 12, 2023Feb 29, 20242AR
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.
Z845252LA1HAYNES MOTOR LINES LLCJul 16, 2026 → Jul 16, 20261
3108046IN—PAM TRANSPORT INCJun 12, 2023 → Feb 29, 20242
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jul 31, 2026