Equipment unit · VIN-decoded · NHTSA vPIC

2023 Peterbilt 579

1XPBD49X4PD856990 · Truck-Tractor · TRUCK
Carriers run under2
14 mo
Inspections4
all-time
OOS inspections0
of 4
First seen06/06/2024
IA
Last seen08/12/2025
LA
Inspected under 2 different carriers in 14 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
1XPBD49X4PD856990
Make
Peterbilt
Model
579
Model year
2023
Body class
Truck-Tractor
Vehicle type
TRUCK
GVWR
Class 8: 33,001 lb and above (14,969 kg and above)
Decoded at
07/12/2026
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 · 06/06/2024 – 08/12/2025

DateStateLevelViol.OOSCarrier (DOT)Plate
08/12/2025LAIII · Driver-only3—JB EXPRESS INC 2099614ZP28306/CA
07/24/2024TNIII · Driver-only0—LIBERTY TRANZ INC 4015868ZP28306/CA
06/10/2024CAI · Full0—LIBERTY TRANZ INC 4015868ZP28306/CA
06/06/2024IAII · Walk-around1—LIBERTY TRANZ INC 4015868ZP28306/HI
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
JB EXPRESS INC209961408/12/202508/12/20251CA
LIBERTY TRANZ INC401586806/06/202407/24/20243CA
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.
ZP28306CA—JB EXPRESS INC08/12/2025 → 08/12/20251
ZP28306CA—LIBERTY TRANZ INC06/10/2024 → 07/24/20242
ZP28306HI—LIBERTY TRANZ INC06/06/2024 → 06/06/20241
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded 07/12/2026
2023 Peterbilt 579 — VIN 1XPBD49X4PD856990