Equipment unit · VIN-decoded · NHTSA vPIC

2023 Peterbilt 579

1XPBD49X9PD861070 · Truck-Tractor · TRUCK
Carriers run under2
20 mo
Inspections8
all-time
OOS inspections3
of 8
First seenAug 6, 2024
NM
Last seenApr 2, 2026
MS
Inspected under 2 different carriers in 20 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
1XPBD49X9PD861070
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 21, 2026
vPIC returns make / model / year / body class / GVWR. Fields it does not resolve are shown as Not decoded rather than guessed.
Decode evidence & sources

Deterministic structure

These fields come directly from VIN positions and the published checksum calculation, with zero store IO.

World manufacturer identifier
1XP

Deterministic · VIN positions 1–3.

Vehicle descriptor section
BD49X

Deterministic · VIN positions 4–8.

Check digit
9 · valid

Deterministic · position 9; calculated value 9.

Model year candidates
1993 or 2023

Position 10 repeats every 30 years; both candidates are retained and neither is silently selected.

North American serial sequence
861070

Deterministic · positions 12–17 for a North American WMI.

Sourced platform inference

The prefix store publishes only at support ≥ 3 and purity ≥ 90%. Prefix confidence is shown beside every established platform claim.

Make
PETERBILT

Prefix basis · 26,166 decoded VINs at 100.0% prefix purity.

Model
579

Prefix basis · 26,166 decoded VINs at 100.0% prefix purity.

Model line
Not established

No sourced model-line label is established.

No source established for this field.

Generation
Not established

No sourced generation label is established.

No source established for this field.

Cab type
Not established

No sourced cab label is established.

No source established for this field.

Federal observation (NHTSA vPIC)

What the federal corpus observed directly for this exact VIN — independent of, and sometimes more specific than, the prefix-level inference above.

Observed model year
2023

Observed directly for this VIN via NHTSA vPIC.

Observed make
PETERBILT

Observed directly for this VIN via NHTSA vPIC.

Observed model
579

Observed directly for this VIN via NHTSA vPIC.

Observed body class
Truck-Tractor

Observed directly for this VIN via NHTSA vPIC.

Observed vehicle type
TRUCK

Observed directly for this VIN via NHTSA vPIC.

GVWR
Class 8: 33,001 lb and above (14,969 kg and above)

Observed directly for this VIN via NHTSA vPIC.

Not established

  • model line
  • generation
  • cab type

These are withheld claims, not negative findings.

02

Inspection history

Every roadside inspection of this VIN, newest first · Aug 6, 2024 – Apr 2, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Apr 2, 2026MSIII · Driver-only0ROBERT L GAST INC 706981P1338591/IN
Mar 30, 2026OHIII · Driver-only1ROBERT L GAST INC 706981P1338591/IL
Nov 21, 2025ORII · Walk-around6OOSTWIN CARRIER LLC 3518735P128222/IL
Oct 29, 2025MOIII · Driver-only2TWIN CARRIER LLC 3518735P1282221/IL
Oct 28, 2025KYI · Full6OOSTWIN CARRIER LLC 3518735P1282221/IL
Jun 30, 2025NYII · Walk-around17TWIN CARRIER LLC 3518735P1282221/IL
May 7, 2025OHI · Full0TWIN CARRIER LLC 3518735P1282221/IL
Aug 6, 2024NMII · Walk-around1OOSTWIN CARRIER LLC 3518735P1240186/IL
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
ROBERT L GAST INC706981Mar 30, 2026Apr 2, 20262NC
TWIN CARRIER LLC3518735Aug 6, 2024Nov 21, 20256OH
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.
P1338591INROBERT L GAST INCApr 2, 2026Apr 2, 20261
P1338591ILROBERT L GAST INCMar 30, 2026Mar 30, 20261
P128222ILTWIN CARRIER LLCNov 21, 2025Nov 21, 20251
P1282221ILTWIN CARRIER LLCMay 7, 2025Oct 29, 20254
P1240186ILTWIN CARRIER LLCAug 6, 2024Aug 6, 20241
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 21, 2026