Equipment unit · VIN-decoded · NHTSA vPIC

591SD4236HR156232

Not yet decoded
Carriers run under2
20 mo
Inspections2
all-time
OOS inspections0
of 2
First seenAug 29, 2023
IA
Last seenApr 10, 2025
IA
Inspected under 2 different carriers in 20 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

This VIN has not been decoded yet — the unit's carrier, inspection and plate history below is reconstructed from the FMCSA inspection feed regardless.

Decode evidence & sources

Deterministic structure

These fields come directly from VIN positions and the published checksum calculation, with zero store IO.

World manufacturer identifier
591

Deterministic · VIN positions 1–3.

Vehicle descriptor section
SD423

Deterministic · VIN positions 4–8.

Check digit
6 · valid

Deterministic · position 9; calculated value 6.

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
156232

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.

Not established

No supported platform claim is established for this prefix

The resolver answered successfully but returned no row above the evidence floor. This does not mean the vehicle has no platform or that no data exists; it means this store cannot make the claim.

Not established

  • platform make
  • platform model
  • model line
  • generation
  • cab type

These are withheld claims, not negative findings.

02

Inspection history

Every roadside inspection of this VIN, newest first · Aug 29, 2023 – Apr 10, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
Apr 10, 2025IAIII · Driver-only1STEINHOFF LANDSCAPE AND CONSTRUCTION INC 1827043BL4158/IA
Aug 29, 2023IAIII · Driver-only1ROBSON ENTERPRISES INC 567878BL4158/IA
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
STEINHOFF LANDSCAPE AND CONSTRUCTION INC1827043Apr 10, 2025Apr 10, 20251IA
ROBSON ENTERPRISES INC567878Aug 29, 2023Aug 29, 20231IA
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.
BL4158IASTEINHOFF LANDSCAPE AND CONSTRUCTION INCApr 10, 2025Apr 10, 20251
BL4158IAROBSON ENTERPRISES INCAug 29, 2023Aug 29, 20231
Sources: FMCSA SAFER · L&I · NHTSA vPIC