Equipment unit · VIN-decoded · NHTSA vPIC

2021 Peterbilt 579

1XPBDP9X1MD734391 · Truck-Tractor · TRUCK
Carriers run under2
34 mo
Inspections5
all-time
OOS inspections0
of 5
First seenJul 12, 2023
CO
Last seenMay 1, 2026
AZ
Inspected under 2 different carriers in 34 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
1XPBDP9X1MD734391
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
Jun 29, 2026
vPIC returns make / model / year / body class / GVWR. Fields it does not resolve are shown as Not decoded rather than guessed.
View sourced platform decode
02

Inspection history

Every roadside inspection of this VIN, newest first · Jul 12, 2023 – May 1, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
May 1, 2026AZII · Walk-around3—HOPPERS HAULING INC 771010AM56881/AZ
Jan 6, 2025AZIII · Driver-only1—HOPPERS HAULING INC 771010AM56881/AZ
Jan 20, 2024NMIII · Driver-only0—T M T TRUCKING COMPANY 576123Z073670/UT
Oct 5, 2023COIII · Driver-only0—T M T TRUCKING COMPANY 576123Z073670/UT
Jul 12, 2023COIII · Driver-only0—T M T TRUCKING COMPANY 576123Z073670/UT
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
HOPPERS HAULING INC771010Jan 6, 2025May 1, 20262AZ
T M T TRUCKING COMPANY576123Jul 12, 2023Jan 20, 20243CO
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.
AM56881AZ—HOPPERS HAULING INCJan 6, 2025 → May 1, 20262
Z073670UT—T M T TRUCKING COMPANYJul 12, 2023 → Jan 20, 20243
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 29, 2026