Equipment unit · VIN-decoded · NHTSA vPIC

2018 Peterbilt 579

1XPBDP9X5JD449155 · Truck-Tractor · TRUCK
Carriers run under1
9 mo
Inspections3
all-time
OOS inspections1
of 3
First seenFeb 25, 2025
AZ
Last seenNov 10, 2025
AZ
01

Decoded identity

From the 17-character VIN via NHTSA vPIC

VIN
1XPBDP9X5JD449155
Make
Peterbilt
Model
579
Model year
2018
Body class
Truck-Tractor
Vehicle type
TRUCK
GVWR
Class 8: 33,001 lb and above (14,969 kg and above)
Decoded at
Jul 31, 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
BDP9X

Deterministic · VIN positions 4–8.

Check digit
5 · valid

Deterministic · position 9; calculated value 5.

Model year candidates
1988 or 2018

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

North American serial sequence
449155

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 · 21,366 decoded VINs at 100.0% prefix purity.

Model
579

Prefix basis · 21,366 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
2018

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 · Feb 25, 2025 – Nov 10, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
Nov 10, 2025AZIII · Driver-only0SILVER ARROW TRANSPORT CO LLC 39339381LA4CZ/AZ
May 21, 2025AZII · Walk-around2OOSSILVER ARROW TRANSPORT CO LLC 39339381LA4CZ/AZ
Feb 25, 2025AZII · Walk-around2SILVER ARROW TRANSPORT CO LLC 3933938Q05221848/AZ
03

Carriers this unit has run under

1 distinct carrier · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
SILVER ARROW TRANSPORT CO LLC3933938Feb 25, 2025Nov 10, 20253AZ
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.
1LA4CZAZSILVER ARROW TRANSPORT CO LLCMay 21, 2025Nov 10, 20252
Q05221848AZSILVER ARROW TRANSPORT CO LLCFeb 25, 2025Feb 25, 20251
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jul 31, 2026