Equipment unit · VIN-decoded · NHTSA vPIC

2016 Peterbilt 579

1XPBD49X4GD321819 · Truck-Tractor · TRUCK
Carriers run under2
24 mo
Inspections5
all-time
OOS inspections2
of 5
First seen11/21/2023
UT
Last seen11/18/2025
TX
Inspected under 2 different carriers in 24 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
1XPBD49X4GD321819
Make
Peterbilt
Model
579
Model year
2016
Body class
Truck-Tractor
Vehicle type
TRUCK
GVWR
Class 8: 33,001 lb and above (14,969 kg and above)
Decoded at
06/28/2026
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 · 11/21/2023 – 11/18/2025

DateStateLevelViol.OOSCarrier (DOT)Plate
11/18/2025TXII · Walk-around7OOSC4 OILFIELD SERVICES LLC 43366071N26044/TX
10/31/2025TXII · Walk-around12OOSC4 OILFIELD SERVICES LLC 43366071N26044/TX
12/08/2024TXII · Walk-around1—DOXA LLC 2608633R564412/TX
04/15/2024MTIII · Driver-only0—DOXA LLC 2608633R564412/TX
11/21/2023UTIII · Driver-only0—DOXA LLC 2608633R564412/TX
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
C4 OILFIELD SERVICES LLC433660710/31/202511/18/20252TX
DOXA LLC260863311/21/202312/08/20243TX
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.
1N26044TX—C4 OILFIELD SERVICES LLC10/31/2025 → 11/18/20252
R564412TX—DOXA LLC11/21/2023 → 12/08/20243
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded 06/28/2026