Equipment unit · VIN-decoded · NHTSA vPIC

2023 Peterbilt 579

1XPBD49X7PD854957 · Truck-Tractor · TRUCK
Carriers run under3
32 mo
Inspections4
all-time
OOS inspections0
of 4
First seenNov 10, 2023
NM
Last seenJul 15, 2026
NM
Inspected under 3 different carriers in 32 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
1XPBD49X7PD854957
Make
Peterbilt
Model
579
Model year
2023
Body class
Truck-Tractor
Vehicle type
TRUCK
GVWR
Class 8: 33,001 lb and above (14,969 kg and above)
Decoded at
Jul 17, 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 · Nov 10, 2023 – Jul 15, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Jul 15, 2026NMIII · Driver-only1—SOUTHWEST CARRIERS LLC 2253695AN04397/AZ
Mar 4, 2026MSI · Full0—NORTON TRANSPORT INC 925129NA/TX
Feb 28, 2025PAIII · Driver-only3—STEVENS TRANSPORT INC 79466R610058/TX
Nov 10, 2023NMII · Walk-around0—STEVENS TRANSPORT INC 79466R610058/TX
03

Carriers this unit has run under

3 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
SOUTHWEST CARRIERS LLC2253695Jul 15, 2026Jul 15, 20261AZ
NORTON TRANSPORT INC925129Mar 4, 2026Mar 4, 20261GA
STEVENS TRANSPORT INC79466Nov 10, 2023Feb 28, 20252TX
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.
AN04397AZ1SOUTHWEST CARRIERS LLCJul 15, 2026 → Jul 15, 20261
NATX—NORTON TRANSPORT INCMar 4, 2026 → Mar 4, 20261
R610058TX—STEVENS TRANSPORT INCNov 10, 2023 → Feb 28, 20252
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jul 17, 2026