Equipment unit · VIN-decoded · NHTSA vPIC

2021 Peterbilt 579

1XPBDP9X5MD734099 · Truck-Tractor · TRUCK
Carriers run under2
29 mo
Inspections7
all-time
OOS inspections2
of 7
First seen06/14/2023
TX
Last seen11/12/2025
MD
Inspected under 2 different carriers in 29 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
1XPBDP9X5MD734099
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
06/21/2026
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 · 06/14/2023 – 11/12/2025

DateStateLevelViol.OOSCarrier (DOT)Plate
11/12/2025MDII · Walk-around3—SI LOGISTICS LLC 3545635P1248376/IL
11/06/2025KYII · Walk-around5OOSSI LOGISTICS LLC 3545635P1248376/IL
05/08/2025GAIII · Driver-only3—SI LOGISTICS LLC 3545635P1248376/IL
04/03/2025ILIII · Driver-only1—SI LOGISTICS LLC 3545635P1248376/IL
04/01/2025ILIII · Driver-only0—SI LOGISTICS LLC 3545635P1248376/IL
02/04/2025ARII · Walk-around3OOSSI LOGISTICS LLC 3545635P1248376/IL
06/14/2023TXI · Full0—NEW PRIME INC 370623KR3S/MO
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
SI LOGISTICS LLC354563502/04/202511/12/20256IL
NEW PRIME INC370606/14/202306/14/20231MO
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.
P1248376IL—SI LOGISTICS LLC02/04/2025 → 11/12/20256
23KR3SMO—NEW PRIME INC06/14/2023 → 06/14/20231
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded 06/21/2026