Equipment unit · VIN-decoded · NHTSA vPIC

1996 Peterbilt 379

1XP5DB9X6TD398333 · Truck-Tractor · TRUCK
Carriers run under3
21 mo
Inspections8
all-time
OOS inspections0
of 8
First seenAug 26, 2023
IA
Last seenMay 28, 2025
NE
Inspected under 3 different carriers in 21 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
1XP5DB9X6TD398333
Make
Peterbilt
Model
379
Model year
1996
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
5DB9X

Deterministic · VIN positions 4–8.

Check digit
6 · valid

Deterministic · position 9; calculated value 6.

Model year candidates
1996 or 2026

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

North American serial sequence
398333

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 · 13,463 decoded VINs at 100.0% prefix purity.

Model
379

Prefix basis · 13,463 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
1996

Observed directly for this VIN via NHTSA vPIC.

Observed make
PETERBILT

Observed directly for this VIN via NHTSA vPIC.

Observed model
379

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 26, 2023 – May 28, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
May 28, 2025NEIII · Driver-only2KORY KLEIN 3141964FY6959/IA
Feb 13, 2025KSII · Walk-around1BACKROADS TRUCKING INC 3319603FY6959/IA
Nov 13, 2024KSII · Walk-around4BACKROADS TRUCKING INC 3319603FY6959/IA
Sep 4, 2024KSII · Walk-around4BACKROADS TRUCKING INC 3319603FY6959/IA
Aug 5, 2024KSII · Walk-around2BACKROADS TRUCKING INC 3319603TEMP/IA
Jan 26, 2024MOII · Walk-around2MARK FREDERICK TRUCKING LLC 2794216FB7520/IA
Dec 6, 2023IAII · Walk-around1MARK FREDERICK TRUCKING LLC 2794216FB7520/IA
Aug 26, 2023IAII · Walk-around2MARK FREDERICK TRUCKING LLC 2794216FB7520/IA
03

Carriers this unit has run under

3 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
KORY KLEIN3141964May 28, 2025May 28, 20251IA
BACKROADS TRUCKING INC3319603Aug 5, 2024Feb 13, 20254IA
MARK FREDERICK TRUCKING LLC2794216Aug 26, 2023Jan 26, 20243IA
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.
FY6959IAKORY KLEINMay 28, 2025May 28, 20251
FY6959IABACKROADS TRUCKING INCSep 4, 2024Feb 13, 20253
TEMPIABACKROADS TRUCKING INCAug 5, 2024Aug 5, 20241
FB7520IAMARK FREDERICK TRUCKING LLCAug 26, 2023Jan 26, 20243
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 21, 2026