Equipment unit · VIN-decoded · NHTSA vPIC

2017 Peterbilt 579

1XPBDP9X5HD442037 · Truck-Tractor · TRUCK
Carriers run under4
37 mo
Inspections13
all-time
OOS inspections4
of 13
First seenJul 12, 2023
KY
Last seenAug 3, 2026
SD
Inspected under 4 different carriers in 37 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
1XPBDP9X5HD442037
Make
Peterbilt
Model
579
Model year
2017
Body class
Truck-Tractor
Vehicle type
TRUCK
GVWR
Class 8: 33,001 lb and above (14,969 kg and above)
Decoded at
Jun 19, 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
1987 or 2017

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

North American serial sequence
442037

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
2017

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 12, 2023 – Aug 3, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Aug 3, 2026SDII · Walk-around1OOSFLATLAND EXPRESS LTD 1585731CSS869/MB
Jul 22, 2026WAIII · Driver-only1FLATLAND EXPRESS LTD 1585731CSS869/MB
Jul 8, 2026SDII · Walk-around1OOSFLATLAND EXPRESS LTD 1585731CSS869/MB
Jun 25, 2026MDII · Walk-around2FLATLAND EXPRESS LTD 1585731CSS869/MB
Jun 3, 2026MNIII · Driver-only2FLATLAND EXPRESS LTD 1585731CSS869/MB
Oct 6, 2025NDI · Full1OOSUPPER DECK TRANSPORT INC 551636CRA961/MB
Apr 23, 2025WAIII · Driver-only2UPPER DECK TRANSPORT INC 551636CRA961/MB
Mar 13, 2025MTII · Walk-around2UPPER DECK TRANSPORT INC 551636CRA961/MB
Jan 10, 2025NDIII · Driver-only0UPPER DECK TRANSPORT INC 551636CRA961/MB
Nov 18, 2024MNIII · Driver-only0UPPER DECK TRANSPORT INC 551636CRA961/MB
May 16, 2024COIII · Driver-only1OOSUPPER DECK TRANSPORT INC 551636CRA961/MB
Feb 26, 2024NDII · Walk-around2DFS DECK FREIGHT SYSTEMS INC 1831030CPT392/MB
Jul 12, 2023KYIII · Driver-only1HQ TRANSPORT INC 3537339CKP503/MB
03

Carriers this unit has run under

4 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
FLATLAND EXPRESS LTD1585731Jun 3, 2026Aug 3, 20265MB
UPPER DECK TRANSPORT INC551636May 16, 2024Oct 6, 20256MB
DFS DECK FREIGHT SYSTEMS INC1831030Feb 26, 2024Feb 26, 20241MB
HQ TRANSPORT INC3537339Jul 12, 2023Jul 12, 20231MB
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.
CSS869MB1FLATLAND EXPRESS LTDJun 3, 2026Aug 3, 20265
CRA961MBUPPER DECK TRANSPORT INCMay 16, 2024Oct 6, 20256
CPT392MBDFS DECK FREIGHT SYSTEMS INCFeb 26, 2024Feb 26, 20241
CKP503MBHQ TRANSPORT INCJul 12, 2023Jul 12, 20231
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 19, 2026