Equipment unit · VIN-decoded · NHTSA vPIC

2021 Peterbilt 579

1XPBDP9X3MD735851 · Truck-Tractor · TRUCK
Carriers run under3
29 mo
Inspections6
all-time
OOS inspections2
of 6
First seenAug 1, 2023
NC
Last seenJan 4, 2026
NM
Inspected under 3 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
1XPBDP9X3MD735851
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 25, 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 1, 2023 – Jan 4, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Jan 4, 2026NMII · Walk-around0—STANDARD TRUCKING LLC 31875573771721/IN
Jul 1, 2025UTI · Full7OOSMERCER TRANSPORTATION COMPANY INC 1547123771721/IN
Jan 8, 2025MEIII · Driver-only0—MERCER TRANSPORTATION COMPANY INC 1547123771721/IN
Mar 28, 2024TNIII · Driver-only1—EW WYLIE LLC 82762212956P/ND
Oct 31, 2023OKI · Full1—EW WYLIE LLC 82762212956P/ND
Aug 1, 2023NCII · Walk-around1OOSEW WYLIE LLC 82762212956P/ND
03

Carriers this unit has run under

3 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
STANDARD TRUCKING LLC3187557Jan 4, 2026Jan 4, 20261UT
MERCER TRANSPORTATION COMPANY INC154712Jan 8, 2025Jul 1, 20252KY
EW WYLIE LLC827622Aug 1, 2023Mar 28, 20243ND
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.
3771721IN—STANDARD TRUCKING LLCJan 4, 2026 → Jan 4, 20261
3771721IN—MERCER TRANSPORTATION COMPANY INCJan 8, 2025 → Jul 1, 20252
12956PND—EW WYLIE LLCAug 1, 2023 → Mar 28, 20243
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 25, 2026