Equipment unit · VIN-decoded · NHTSA vPIC

2021 Peterbilt 579

1XPBDP9X1MD731684 · Truck-Tractor · TRUCK
Carriers run under2
35 mo
Inspections5
all-time
OOS inspections1
of 5
First seen06/15/2023
PA
Last seen05/14/2026
VA
Inspected under 2 different carriers in 35 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
1XPBDP9X1MD731684
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
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 · 06/15/2023 – 05/14/2026

DateStateLevelViol.OOSCarrier (DOT)Plate
05/14/2026VAI · Full2OOSCAESAR PENCE LLC 370695156185PZ/VA
05/14/2026VAI · Full0—CAESAR PENCE LLC 370695156185PZ/VA
05/06/2026VAI · Full2—CAESAR PENCE LLC 370695156185PZ/VA
05/30/2024NCI · Full3—COWAN SYSTEMS LLC 5488803096373/IN
06/15/2023PAIII · Driver-only2—COWAN SYSTEMS LLC 5488803096373/IN
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
CAESAR PENCE LLC370695105/06/202605/14/20263VA
COWAN SYSTEMS LLC54888006/15/202305/30/20242MD
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.
56185PZVA—CAESAR PENCE LLC05/06/2026 → 05/14/20263
3096373IN—COWAN SYSTEMS LLC06/15/2023 → 05/30/20242
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded 06/29/2026
2021 Peterbilt 579 — VIN 1XPBDP9X1MD731684