Equipment unit · VIN-decoded · NHTSA vPIC

2022 Polar Tank Trailer

3H6KF4323N3118247 · Trailer · TRAILER
Carriers run under2
27 mo
Inspections8
all-time
OOS inspections1
of 8
First seenJul 17, 2023
OK
Last seenOct 20, 2025
OK
Inspected under 2 different carriers in 27 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
3H6KF4323N3118247
Make
Polar Tank Trailer
Model
Polar Tank Trailer
Model year
2022
Body class
Trailer
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Jun 18, 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
KF432

Deterministic · VIN positions 4–8.

Check digit
3 · valid

Deterministic · position 9; calculated value 3.

Model year candidates
1992 or 2022

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

North American serial sequence
118247

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
POLAR TANK TRAILER

Prefix basis · 415 decoded VINs at 100.0% prefix purity.

Model
Polar Tank Trailer

Prefix basis · 415 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
2022

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

  • model line
  • generation
  • cab type

These are withheld claims, not negative findings.

02

Inspection history

Every roadside inspection of this VIN, newest first · Jul 17, 2023 – Oct 20, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
Oct 20, 2025OKI · Full0QUEST LINER INC 1609038815995/WI
Aug 27, 2025IAI · Full2QUEST LINER INC 1609038815995/WI
Jun 9, 2025OKII · Walk-around0QUEST LINER INC 1609038815995/WI
Jan 13, 2025TXII · Walk-around2QUEST LINER INC 1609038815995/WI
Sep 19, 2024MOI · Full2OOSQUEST LINER INC 1609038815995/WI
May 16, 2024MOI · Full0QUEST LINER INC 1609038815995/WI
Jan 18, 2024MOII · Walk-around2QUEST LINER INC 1609038815995/WI
Jul 17, 2023OKII · Walk-around0WFJ JANITORIAL SERVICES INC 1609083805995/WI
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
QUEST LINER INC1609038Jan 18, 2024Oct 20, 20257IA
WFJ JANITORIAL SERVICES INC1609083Jul 17, 2023Jul 17, 20231OR
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.
815995WIQUEST LINER INCJan 18, 2024Oct 20, 20257
805995WIWFJ JANITORIAL SERVICES INCJul 17, 2023Jul 17, 20231
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 18, 2026