Equipment unit · VIN-decoded · NHTSA vPIC

2023 Peterbilt 579

1XPBD49X7PD879745 · Truck-Tractor · TRUCK
Carriers run under1
34 mo
Inspections13
all-time
OOS inspections2
of 13
First seenJul 13, 2023
CA
Last seenMay 12, 2026
CA
01

Decoded identity

From the 17-character VIN via NHTSA vPIC

VIN
1XPBD49X7PD879745
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 16, 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
7 · valid

Deterministic · position 9; calculated value 7.

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
879745

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 · Jul 13, 2023 – May 12, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
May 12, 2026CAV · Vehicle-only0WILLIAMS TANK LINES LLC 229047YP96874/CA
Mar 3, 2026CAI · Full0WILLIAMS TANK LINES LLC 229047YP96874/CA
Sep 13, 2025CAII · Walk-around0WILLIAMS TANK LINES LLC 229047YP96874/CA
Aug 27, 2025CAII · Walk-around0WILLIAMS TANK LINES LLC 229047YP96874/CA
May 20, 2025CAI · Full0WILLIAMS TANK LINES LLC 229047YP96874/CA
Apr 30, 2025CAI · Full2OOSWILLIAMS TANK LINES LLC 229047YP96874/CA
Apr 9, 2025CAII · Walk-around0WILLIAMS TANK LINES LLC 229047YP96874/CA
Apr 7, 2025CAII · Walk-around0WILLIAMS TANK LINES LLC 229047YP96874/CA
Mar 2, 2025CAII · Walk-around0WILLIAMS TANK LINES LLC 229047YP96874/CA
Apr 4, 2024CAV · Vehicle-only0WILLIAMS TANK LINES LLC 229047YP96874/CA
Feb 14, 2024CAII · Walk-around2WILLIAMS TANK LINES LLC 229047YP96874/CA
Jan 28, 2024CAI · Full1OOSWILLIAMS TANK LINES LLC 229047YP96874/CA
Jul 13, 2023CAV · Vehicle-only0WILLIAMS TANK LINES LLC 229047YP96874/CA
03

Carriers this unit has run under

1 distinct carrier · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
WILLIAMS TANK LINES LLC229047Jul 13, 2023May 12, 202613CA
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.
YP96874CAWILLIAMS TANK LINES LLCJul 13, 2023May 12, 202613
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 16, 2026