Equipment unit · VIN-decoded · NHTSA vPIC

2026 Polar Tank Trailer

3H6KF4428T3177077 · Trailer · TRAILER
Carriers run under1
7 mo
Inspections4
all-time
OOS inspections0
of 4
First seenDec 3, 2025
KS
Last seenJul 17, 2026
IN
01

Decoded identity

From the 17-character VIN via NHTSA vPIC

VIN
3H6KF4428T3177077
Make
Polar Tank Trailer
Model
Polar Tank Trailer
Model year
2026
Body class
Trailer
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Jul 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
3H6

Deterministic · VIN positions 1–3.

Vehicle descriptor section
KF442

Deterministic · VIN positions 4–8.

Check digit
8 · valid

Deterministic · position 9; calculated value 8.

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
177077

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 · 8 decoded VINs at 100.0% prefix purity.

Model
Polar Tank Trailer

Prefix basis · 8 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
2026

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 · Dec 3, 2025 – Jul 17, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Jul 17, 2026INIII · Driver-only1QUEST LINER INC 1609038865602/WI
Feb 26, 2026INIII · Driver-only0QUEST LINER INC 1609038865602/WI
Feb 9, 2026OHII · Walk-around0QUEST LINER INC 1609038865602/WI
Dec 3, 2025KSI · Full0QUEST LINER INC 1609038865602/WI
03

Carriers this unit has run under

1 distinct carrier · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
QUEST LINER INC1609038Dec 3, 2025Jul 17, 20264IA
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.
865602WI2QUEST LINER INCDec 3, 2025Jul 17, 20264
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jul 19, 2026