Equipment unit · VIN-decoded · NHTSA vPIC

4T9TK4228F1121092

Not yet decoded
Carriers run under2
19 mo
Inspections2
all-time
OOS inspections1
of 2
First seenApr 18, 2024
TX
Last seenNov 5, 2025
TX
Inspected under 2 different carriers in 19 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
4T9

Deterministic · VIN positions 1–3.

Vehicle descriptor section
TK422

Deterministic · VIN positions 4–8.

Check digit
8 · valid

Deterministic · position 9; calculated value 8.

Model year candidates
1985 or 2015

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

North American serial sequence
121092

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
TANKKO LLC

Prefix basis · 15 decoded VINs at 100.0% prefix purity.

Model
Tankko LLC

Prefix basis · 15 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 · Apr 18, 2024 – Nov 5, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
Nov 5, 2025TXII · Walk-around12OOSNP DIAMOND CONSTRUCTION LLC 386422151B056/TX
Apr 18, 2024TXII · Walk-around5TOPCAT OILFIELD SERVICES LLC 2011833Y72954/TX
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
NP DIAMOND CONSTRUCTION LLC386422Nov 5, 2025Nov 5, 20251TX
TOPCAT OILFIELD SERVICES LLC2011833Apr 18, 2024Apr 18, 20241TX
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.
151B056TXNP DIAMOND CONSTRUCTION LLCNov 5, 2025Nov 5, 20251
Y72954TXTOPCAT OILFIELD SERVICES LLCApr 18, 2024Apr 18, 20241
Sources: FMCSA SAFER · L&I · NHTSA vPIC