Equipment unit · VIN-decoded · NHTSA vPIC

2016 Peterbilt 579

1XPBDP9X4GD305556 · Truck-Tractor · TRUCK
Carriers run under2
31 mo
Inspections9
all-time
OOS inspections6
of 9
First seenOct 13, 2023
CA
Last seenMay 14, 2026
CA
Inspected under 2 different carriers in 31 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
1XPBDP9X4GD305556
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
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 · Oct 13, 2023 – May 14, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
May 14, 2026CAII · Walk-around3OOSOLDCASTLE APG WEST INC 543279F18538/CA
Aug 28, 2025CAI · Full6OOSOLDCASTLE APG WEST INC 543279F18538/CA
Aug 29, 2024CAI · Full4OOSOLDCASTLE APG WEST INC 543279F18538/CA
May 28, 2024CAII · Walk-around5OOSOLDCASTLE APG WEST INC 543279F18538/CA
Jan 15, 2024CAIII · Driver-only0—CALSTONE CO INC 26520169F18538/CA
Nov 16, 2023CAII · Walk-around3OOSCALSTONE CO INC 26520169F18538/CA
Oct 25, 2023CAI · Full2OOSCALSTONE CO INC 26520169F18538/CA
Oct 25, 2023CAI · Full0—CALSTONE CO INC 26520169F18538/CA
Oct 13, 2023CAIII · Driver-only0—CALSTONE CO INC 26520169F18538/CA
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
OLDCASTLE APG WEST INC54327May 28, 2024May 14, 20264AZ
CALSTONE CO INC2652016Oct 13, 2023Jan 15, 20245CA
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.
9F18538CA—OLDCASTLE APG WEST INCMay 28, 2024 → May 14, 20264
9F18538CA—CALSTONE CO INCOct 13, 2023 → Jan 15, 20245
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 19, 2026