Equipment unit · VIN-decoded · NHTSA vPIC

2023 Peterbilt 579

1XPBDP9X4PD839155 · Truck-Tractor · TRUCK
Carriers run under2
36 mo
Inspections5
all-time
OOS inspections0
of 5
First seen06/26/2023
AZ
Last seen06/22/2026
NM
Inspected under 2 different carriers in 36 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
1XPBDP9X4PD839155
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
06/29/2026
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 · 06/26/2023 – 06/22/2026

DateStateLevelViol.OOSCarrier (DOT)Plate
06/22/2026NMII · Walk-around0—ARAGON INC 783776AL25179/AZ
02/09/2026NMII · Walk-around0—ARAGON INC 783776AL25179/AZ
12/29/2025NMIII · Driver-only0—ARAGON INC 783776AL25179/AZ
08/18/2025NMI · Full0—ARAGON INC 783776AL25179/AZ
06/26/2023AZI · Full2—WESTERN UNITED ELECTRIC SUPPLY CORP 451782AL25179/AZ
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
ARAGON INC78377608/18/202506/22/20264NM
WESTERN UNITED ELECTRIC SUPPLY CORP45178206/26/202306/26/20231CO
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.
AL25179AZ1ARAGON INC08/18/2025 → 06/22/20264
AL25179AZ—WESTERN UNITED ELECTRIC SUPPLY CORP06/26/2023 → 06/26/20231
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded 06/29/2026
2023 Peterbilt 579 — VIN 1XPBDP9X4PD839155