Equipment unit · VIN-decoded · NHTSA vPIC

2023 Peterbilt 579

1XPBD49X8PD875588 · Truck-Tractor · TRUCK
Carriers run under3
30 mo
Inspections7
all-time
OOS inspections3
of 7
First seenSep 15, 2023
IL
Last seenMar 23, 2026
AZ
Inspected under 3 different carriers in 30 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
1XPBD49X8PD875588
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
8 · valid

Deterministic · position 9; calculated value 8.

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
875588

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 · Sep 15, 2023 – Mar 23, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Mar 23, 2026AZII · Walk-around2OOSLONGHORN CARGO LLC 3076448AKB443/KS
May 29, 2025LAI · Full6RS6 EXPRESS LLC 3894456P1203686/IL
May 22, 2025KSII · Walk-around5OOSRS6 EXPRESS LLC 3894456P1203686/IL
Jul 31, 2024NCIII · Driver-only1RS6 EXPRESS LLC 3894456P1203686/IL
Mar 7, 2024TNII · Walk-around3OOSRS6 EXPRESS LLC 3894456P1203686/UK
Oct 18, 2023CAII · Walk-around0VAKO TRUCKING LLC 3846628P1203686/IL
Sep 15, 2023ILI · Full0VAKO TRUCKING LLC 3846628P1203686/IL
03

Carriers this unit has run under

3 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
LONGHORN CARGO LLC3076448Mar 23, 2026Mar 23, 20261KS
RS6 EXPRESS LLC3894456Mar 7, 2024May 29, 20254IL
VAKO TRUCKING LLC3846628Sep 15, 2023Oct 18, 20232IL
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.
AKB443KSLONGHORN CARGO LLCMar 23, 2026Mar 23, 20261
P1203686ILRS6 EXPRESS LLCJul 31, 2024May 29, 20253
P1203686UKRS6 EXPRESS LLCMar 7, 2024Mar 7, 20241
P1203686ILVAKO TRUCKING LLCSep 15, 2023Oct 18, 20232
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 21, 2026