Equipment unit · VIN-decoded · NHTSA vPIC

2021 Peterbilt 579

1XPBD49X4MD734769 · Truck-Tractor · TRUCK
Carriers run under3
30 mo
Inspections4
all-time
OOS inspections0
of 4
First seenJun 20, 2023
NY
Last seenDec 4, 2025
MD
Inspected under 3 different carriers in 30 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
1XPBD49X4MD734769
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
Jul 12, 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 · Jun 20, 2023 – Dec 4, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
Dec 4, 2025MDI · Full1—KALAY EXPRESS LLC 3531331PAW9047/MN
Dec 30, 2023CTII · Walk-around0—CLARK TRANSFER INC 31782AG17797/PA
Dec 13, 2023NVIII · Driver-only0—BOISE BOYS INC 1221227AM654/ID
Jun 20, 2023NYII · Walk-around0—CLARK TRANSFER INC 31782AG17797/PA
03

Carriers this unit has run under

3 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
KALAY EXPRESS LLC3531331Dec 4, 2025Dec 4, 20251MN
CLARK TRANSFER INC31782Jun 20, 2023Dec 30, 20232PA
BOISE BOYS INC1221227Dec 13, 2023Dec 13, 20231ID
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.
PAW9047MN—KALAY EXPRESS LLCDec 4, 2025 → Dec 4, 20251
AG17797PA—CLARK TRANSFER INCJun 20, 2023 → Dec 30, 20232
AM654ID—BOISE BOYS INCDec 13, 2023 → Dec 13, 20231
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jul 12, 2026