Equipment unit · VIN-decoded · NHTSA vPIC

2021 Ox Tishomingo Acquisition

4T91A2321MA086017 · Trailer · TRAILER
Carriers run under1
32 mo
Inspections3
all-time
OOS inspections1
of 3
First seenSep 29, 2023
TX
Last seenMay 28, 2026
TX
01

Decoded identity

From the 17-character VIN via NHTSA vPIC

VIN
4T91A2321MA086017
Make
Ox
Model
Tishomingo Acquisition
Model year
2021
Body class
Trailer
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Aug 9, 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
4T9

Deterministic · VIN positions 1–3.

Vehicle descriptor section
1A232

Deterministic · VIN positions 4–8.

Check digit
1 · valid

Deterministic · position 9; calculated value 1.

Model year candidates
1991 or 2021

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

North American serial sequence
086017

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
OX

Prefix basis · 9 decoded VINs at 100.0% prefix purity.

Model
Tishomingo Acquisition

Prefix basis · 9 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
2021

Observed directly for this VIN via NHTSA vPIC.

Observed make
OX

Observed directly for this VIN via NHTSA vPIC.

Observed model
Tishomingo Acquisition

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 · Sep 29, 2023 – May 28, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
May 28, 2026TXI · Full7OOSHAMMETT EXCAVATION INC 790397BT2102/OK
Feb 12, 2024TXII · Walk-around1HAMMETT EXCAVATION INC 790397BT2102/OK
Sep 29, 2023TXII · Walk-around1HAMMETT EXCAVATION INC 790397BT2102/OK
03

Carriers this unit has run under

1 distinct carrier · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
HAMMETT EXCAVATION INC790397Sep 29, 2023May 28, 20263TX
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.
BT2102OKHAMMETT EXCAVATION INCSep 29, 2023May 28, 20263
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Aug 9, 2026