Equipment unit · VIN-decoded · NHTSA vPIC

1PMKR4226P1118414

Not yet decoded
Carriers run under2
23 mo
Inspections2
all-time
OOS inspections0
of 2
First seenSep 7, 2023
MN
Last seenAug 13, 2025
SD
Inspected under 2 different carriers in 23 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
1PM

Deterministic · VIN positions 1–3.

Vehicle descriptor section
KR422

Deterministic · VIN positions 4–8.

Check digit
6 · valid

Deterministic · position 9; calculated value 6.

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
118414

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 · 73 decoded VINs at 100.0% prefix purity.

Model
Polar Tank Trailer

Prefix basis · 73 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.

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 · Sep 7, 2023 – Aug 13, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
Aug 13, 2025SDIII · Driver-only0CARSTENSEN & SONS TRUCKING INC 2855792151STZ/MN
Sep 7, 2023MNIII · Driver-only1STIER TRUCKING LLC 15904212151STZ/MN
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
CARSTENSEN & SONS TRUCKING INC285579Aug 13, 2025Aug 13, 20251MN
STIER TRUCKING LLC1590421Sep 7, 2023Sep 7, 20231MN
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.
2151STZMNCARSTENSEN & SONS TRUCKING INCAug 13, 2025Aug 13, 20251
2151STZMNSTIER TRUCKING LLCSep 7, 2023Sep 7, 20231
Sources: FMCSA SAFER · L&I · NHTSA vPIC