Equipment unit · VIN-decoded · NHTSA vPIC

2021 Peterbilt 579

1XPBD49X4MD736151 · Truck-Tractor · TRUCK
Carriers run under4
34 mo
Inspections5
all-time
OOS inspections1
of 5
First seenAug 29, 2023
OH
Last seenJun 6, 2026
MD
Inspected under 4 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
1XPBD49X4MD736151
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 28, 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 – Jun 6, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Jun 6, 2026MDI · Full4OOSBONANZA CARRIERS LLC 3655676AZ539P/NJ
Nov 10, 2025NJI · Full0—CAZ TRUCKING CORP 4308513AZ539P/NJ
May 27, 2025NYII · Walk-around1—FOUR RUNNERS TRANSPORT INC 4042423AZ539P/NJ
Apr 11, 2024TNIII · Driver-only0—HMD TRUCKING INC 9765603010646/IN
Aug 29, 2023OHIII · Driver-only0—HMD TRUCKING INC 9765603010646/IN
03

Carriers this unit has run under

4 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
BONANZA CARRIERS LLC3655676Jun 6, 2026Jun 6, 20261IL
CAZ TRUCKING CORP4308513Nov 10, 2025Nov 10, 20251NJ
FOUR RUNNERS TRANSPORT INC4042423May 27, 2025May 27, 20251NJ
HMD TRUCKING INC976560Aug 29, 2023Apr 11, 20242IL
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.
AZ539PNJ—BONANZA CARRIERS LLCJun 6, 2026 → Jun 6, 20261
AZ539PNJ—CAZ TRUCKING CORPNov 10, 2025 → Nov 10, 20251
AZ539PNJ—FOUR RUNNERS TRANSPORT INCMay 27, 2025 → May 27, 20251
3010646IN—HMD TRUCKING INCAug 29, 2023 → Apr 11, 20242
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 28, 2026