Equipment unit · VIN-decoded · NHTSA vPIC

2023 Peterbilt 579

1XPBD49XXPD804134 · Truck-Tractor · TRUCK
Carriers run under2
34 mo
Inspections9
all-time
OOS inspections2
of 9
First seenJul 31, 2023
AZ
Last seenMay 25, 2026
TN
Inspected under 2 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
1XPBD49XXPD804134
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
Jun 19, 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 · Jul 31, 2023 – May 25, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
May 25, 2026TNIII · Driver-only1—SPG TRANSPORTATION INC 2881143ZP53544/TN
Apr 3, 2026TNII · Walk-around2—SPG TRANSPORTATION INC 2881143ZP53544/CA
Nov 14, 2025TNIII · Driver-only1—SPG TRANSPORTATION INC 2881143ZP53544/CA
Aug 19, 2025NMI · Full2—SPG TRANSPORTATION INC 2881143ZP53544/CA
Jun 17, 2025ILIII · Driver-only2—SPG TRANSPORTATION INC 2881143ZP53544/CA
May 13, 2025ILIII · Driver-only0—SPG TRANSPORTATION INC 2881143ZP53544/CA
Apr 23, 2025MOII · Walk-around2—SPG TRANSPORTATION INC 2881143ZP53544/CA
Aug 30, 2023ALIII · Driver-only1OOSWADSON TRANS LLC 3872512YP58416/CA
Jul 31, 2023AZII · Walk-around7OOSWADSON TRANS LLC 3872512YP58416/CA
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
SPG TRANSPORTATION INC2881143Apr 23, 2025May 25, 20267TX
WADSON TRANS LLC3872512Jul 31, 2023Aug 30, 20232CA
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.
ZP53544TN—SPG TRANSPORTATION INCMay 25, 2026 → May 25, 20261
ZP53544CA—SPG TRANSPORTATION INCApr 23, 2025 → Apr 3, 20266
YP58416CA—WADSON TRANS LLCJul 31, 2023 → Aug 30, 20232
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 19, 2026