Equipment unit · VIN-decoded · NHTSA vPIC

2023 Peterbilt 579

1XPBD49XXPD875589 · Truck-Tractor · TRUCK
Carriers run under3
31 mo
Inspections4
all-time
OOS inspections2
of 4
First seenOct 27, 2023
AZ
Last seenMay 11, 2026
FL
Inspected under 3 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
1XPBD49XXPD875589
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
Jul 12, 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
X · valid

Deterministic · position 9; calculated value X.

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
875589

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 · Oct 27, 2023 – May 11, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
May 11, 2026FLI · Full1OOSFORCE TRANSPORTATION INC 3176162SPG309437/IL
Jan 20, 2026AZII · Walk-around2FORCE TRANSPORTATION INC 3176162P1200252/IL
Aug 4, 2025TNIII · Driver-only0RS6 EXPRESS LLC 3894456P1200252/IL
Oct 27, 2023AZI · Full7OOSVAKO TRUCKING LLC 3846628P1200252/IL
03

Carriers this unit has run under

3 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
FORCE TRANSPORTATION INC3176162Jan 20, 2026May 11, 20262IA
RS6 EXPRESS LLC3894456Aug 4, 2025Aug 4, 20251IL
VAKO TRUCKING LLC3846628Oct 27, 2023Oct 27, 20231IL
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.
SPG309437ILFORCE TRANSPORTATION INCMay 11, 2026May 11, 20261
P1200252ILFORCE TRANSPORTATION INCJan 20, 2026Jan 20, 20261
P1200252ILRS6 EXPRESS LLCAug 4, 2025Aug 4, 20251
P1200252ILVAKO TRUCKING LLCOct 27, 2023Oct 27, 20231
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jul 12, 2026