Equipment unit · VIN-decoded · NHTSA vPIC

2023 Polar Tank Trailer

3H6KF4521P3119591 · Trailer · TRAILER
Carriers run under2
24 mo
Inspections3
all-time
OOS inspections0
of 3
First seenOct 19, 2023
TN
Last seenOct 23, 2025
OH
Inspected under 2 different carriers in 24 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
3H6KF4521P3119591
Make
Polar Tank Trailer
Model
Polar Tank Trailer
Model year
2023
Body class
Trailer
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Aug 5, 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
3H6

Deterministic · VIN positions 1–3.

Vehicle descriptor section
KF452

Deterministic · VIN positions 4–8.

Check digit
1 · valid

Deterministic · position 9; calculated value 1.

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
119591

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.

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
POLAR TANK TRAILER

Observed directly for this VIN via NHTSA vPIC.

Observed model
Polar Tank Trailer

Observed directly for this VIN via NHTSA vPIC.

Observed body class
Trailer

Observed directly for this VIN via NHTSA vPIC.

Observed vehicle type
TRAILER

Observed directly for this VIN via NHTSA vPIC.

GVWR
Not established

Observed directly for this VIN via NHTSA vPIC.

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 · Oct 19, 2023 – Oct 23, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
Oct 23, 2025OHI · Full0HENIFF TRANSPORTATION SYSTEMS LLC 759493PB42149/IN
Oct 19, 2023KYI · Full0HENIFF FOOD GRADE LLC 8347261RF22093/IN
Oct 19, 2023TNI · Full0HENIFF FOOD GRADE LLC 834726PB42149/IN
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
HENIFF TRANSPORTATION SYSTEMS LLC759493Oct 23, 2025Oct 23, 20251IL
HENIFF FOOD GRADE LLC834726Oct 19, 2023Oct 19, 20232IL
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.
PB42149IN2HENIFF TRANSPORTATION SYSTEMS LLCOct 23, 2025Oct 23, 20251
1RF22093INHENIFF FOOD GRADE LLCOct 19, 2023Oct 19, 20231
PB42149INHENIFF FOOD GRADE LLCOct 19, 2023Oct 19, 20231
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Aug 5, 2026