Equipment unit · VIN-decoded · NHTSA vPIC

2021 Peterbilt 579

1XPBD49X7MD721787 · Truck-Tractor · TRUCK
Carriers run under2
29 mo
Inspections5
all-time
OOS inspections2
of 5
First seenJan 24, 2024
KY
Last seenJun 15, 2026
NY
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
1XPBD49X7MD721787
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 29, 2026
vPIC returns make / model / year / body class / GVWR. Fields it does not resolve are shown as Not decoded rather than guessed.
View sourced platform decode
02

Inspection history

Every roadside inspection of this VIN, newest first · Jan 24, 2024 – Jun 15, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Jun 15, 2026NYII · Walk-around0—MERCER TRANSPORTATION COMPANY INC 1547123801570/IN
May 14, 2026NYI · Full2OOSMERCER TRANSPORTATION COMPANY INC 1547123801570/IN
Jan 13, 2026MDII · Walk-around0—MERCER TRANSPORTATION COMPANY INC 1547123801570/IN
Aug 20, 2025SDIII · Driver-only0—MERCER TRANSPORTATION COMPANY INC 1547123801570/IN
Jan 24, 2024KYI · Full1OOSHILL TOP TRANSPORTATION INC 566463J879HY/TN
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
MERCER TRANSPORTATION COMPANY INC154712Aug 20, 2025Jun 15, 20264KY
HILL TOP TRANSPORTATION INC566463Jan 24, 2024Jan 24, 20241KY
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.
3801570IN1MERCER TRANSPORTATION COMPANY INCAug 20, 2025 → Jun 15, 20264
J879HYTN—HILL TOP TRANSPORTATION INCJan 24, 2024 → Jan 24, 20241
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 29, 2026