Equipment unit · VIN-decoded · NHTSA vPIC

2023 Peterbilt 579

1XPBDP9X5PD836944 · Truck-Tractor · TRUCK
Carriers run under3
16 mo
Inspections5
all-time
OOS inspections1
of 5
First seenAug 17, 2023
OR
Last seenDec 13, 2024
CA
Inspected under 3 different carriers in 16 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
1XPBDP9X5PD836944
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 29, 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
1993 or 2023

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

North American serial sequence
836944

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
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 17, 2023 – Dec 13, 2024

DateStateLevelViol.OOSCarrier (DOT)Plate
Dec 13, 2024CAIII · Driver-only3G I XPRESS INC 4189087ZP31948/CA
Jun 7, 2024CAII · Walk-around0G I XPRESS INC 4189087YP57536/CA
May 7, 2024NJIII · Driver-only0G I XPRESS INC 4189087YP57536/CA
Apr 5, 2024DEII · Walk-around3OOSSAHIB EXPRESS LLC 3391139YP57536/CA
Aug 17, 2023ORIII · Driver-only0SAHIB EXPRESS INC 3676025YP57536/CA
03

Carriers this unit has run under

3 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
G I XPRESS INC4189087May 7, 2024Dec 13, 20243CA
SAHIB EXPRESS LLC3391139Apr 5, 2024Apr 5, 20241TX
SAHIB EXPRESS INC3676025Aug 17, 2023Aug 17, 20231CA
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.
ZP31948CAG I XPRESS INCDec 13, 2024Dec 13, 20241
YP57536CAG I XPRESS INCMay 7, 2024Jun 7, 20242
YP57536CASAHIB EXPRESS LLCApr 5, 2024Apr 5, 20241
YP57536CASAHIB EXPRESS INCAug 17, 2023Aug 17, 20231
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 29, 2026