Equipment unit · VIN-decoded · NHTSA vPIC

2023 Peterbilt 579

1XPBD49X9PD837271 · Truck-Tractor · TRUCK
Carriers run under3
34 mo
Inspections12
all-time
OOS inspections1
of 12
First seen08/10/2023
AL
Last seen06/22/2026
AZ
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
1XPBD49X9PD837271
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
06/17/2026
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 · 08/10/2023 – 06/22/2026

DateStateLevelViol.OOSCarrier (DOT)Plate
06/22/2026AZII · Walk-around5—AAD TRANSPORT INC 4222112RC48964/MI
11/17/2025NMII · Walk-around1—AAD TRANSPORT INC 4222112TEMP/MI
08/10/2025CAII · Walk-around1—AAD TRANSPORT INC 4222112RC48964/MI
04/23/2025ILIII · Driver-only0—AAD TRANSPORT INC 4222112RC48964/MI
03/01/2024MOIII · Driver-only0—SPEAR LOGISTICS LLC 3199716P1205380/IL
02/25/2024MTIII · Driver-only0—SPEAR LOGISTICS LLC 3199716P1205380/IL
02/15/2024NMII · Walk-around2—SPEAR LOGISTICS LLC 3199716P1205380/IL
02/08/2024MSII · Walk-around1OOSCHELSEA XPRESS 3348286P1205380/IL
02/05/2024SDII · Walk-around2—SPEAR LOGISTICS LLC 3199716P1205380/IL
10/25/2023LAIII · Driver-only2—SPEAR LOGISTICS LLC 3199716P1205380/IL
08/29/2023ARIII · Driver-only1—SPEAR LOGISTICS LLC 3199716P1205380/IL
08/10/2023ALIII · Driver-only1—SPEAR LOGISTICS LLC 3199716P1205380/IL
03

Carriers this unit has run under

3 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
AAD TRANSPORT INC422211204/23/202506/22/20264MI
SPEAR LOGISTICS LLC319971608/10/202303/01/20247IA
CHELSEA XPRESS334828602/08/202402/08/20241CA
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.
RC48964MI1AAD TRANSPORT INC04/23/2025 → 06/22/20263
TEMPMI—AAD TRANSPORT INC11/17/2025 → 11/17/20251
P1205380IL—SPEAR LOGISTICS LLC08/10/2023 → 03/01/20247
P1205380IL—CHELSEA XPRESS02/08/2024 → 02/08/20241
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded 06/17/2026