Equipment unit · VIN-decoded · NHTSA vPIC

2019 Polar Tank Trailer

3H6SS4220K3711072 · TRAILER
Carriers run under1
15 mo
Inspections3
all-time
OOS inspections0
of 3
First seenOct 30, 2024
OK
Last seenJan 16, 2026
OK
01

Decoded identity

From the 17-character VIN via NHTSA vPIC

VIN
3H6SS4220K3711072
Make
Polar Tank Trailer
Model
Not decoded
Model year
2019
Body class
Not decoded
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
SS422

Deterministic · VIN positions 4–8.

Check digit
0 · valid

Deterministic · position 9; calculated value 0.

Model year candidates
1989 or 2019

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

North American serial sequence
711072

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
2019

Observed directly for this VIN via NHTSA vPIC.

Observed make
POLAR TANK TRAILER

Observed directly for this VIN via NHTSA vPIC.

Observed model
Not established

Observed directly for this VIN via NHTSA vPIC.

Observed body class
Not established

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 30, 2024 – Jan 16, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Jan 16, 2026OKIII · Driver-only1B & W READY MIX LLC 485478AN9867/OK
Nov 4, 2025OKII · Walk-around1B & W READY MIX LLC 485478AN9867/OK
Oct 30, 2024OKIII · Driver-only3B & W READY MIX LLC 485478AN9867/OK
03

Carriers this unit has run under

1 distinct carrier · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
B & W READY MIX LLC485478Oct 30, 2024Jan 16, 20263OK
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.
AN9867OKB & W READY MIX LLCOct 30, 2024Jan 16, 20263
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Aug 5, 2026