Equipment unit · VIN-decoded · NHTSA vPIC

2021 Peterbilt 579

1XPBD49X9MD735626 · Truck-Tractor · TRUCK
Carriers run under3
34 mo
Inspections7
all-time
OOS inspections0
of 7
First seenSep 15, 2023
UT
Last seenJul 6, 2026
TN
Inspected under 3 different carriers in 34 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
1XPBD49X9MD735626
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 · Sep 15, 2023 – Jul 6, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Jul 6, 2026TNIII · Driver-only2—NORRIS TRANSPORTATION SERVICES LLC 4471250W1989HY/TN
Apr 21, 2026MNIII · Driver-only1—NORRIS TRANSPORTATION SERVICES LLC 4471250W1989HY/TN
May 30, 2025TNIII · Driver-only0—MORRISTOWN DRIVER'S SERVICE INC 252487U9820HY/TN
Apr 24, 2025TNII · Walk-around2—MORRISTOWN DRIVER'S SERVICE INC 252487U9820HY/TN
Feb 19, 2025TNIII · Driver-only1—MORRISTOWN DRIVER'S SERVICE INC 252487U9820HY/TN
Feb 1, 2024NMII · Walk-around1—D & M CARRIERS LLC 9633003KC406/OK
Sep 15, 2023UTIII · Driver-only0—D & M CARRIERS LLC 9633003EP814/OK
03

Carriers this unit has run under

3 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
NORRIS TRANSPORTATION SERVICES LLC4471250Apr 21, 2026Jul 6, 20262TN
MORRISTOWN DRIVER'S SERVICE INC252487Feb 19, 2025May 30, 20253TN
D & M CARRIERS LLC963300Sep 15, 2023Feb 1, 20242OK
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.
W1989HYTN1NORRIS TRANSPORTATION SERVICES LLCApr 21, 2026 → Jul 6, 20262
U9820HYTN—MORRISTOWN DRIVER'S SERVICE INCFeb 19, 2025 → May 30, 20253
3KC406OK1D & M CARRIERS LLCFeb 1, 2024 → Feb 1, 20241
3EP814OK1D & M CARRIERS LLCSep 15, 2023 → Sep 15, 20231
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 25, 2026