Equipment unit · VIN-decoded · NHTSA vPIC

1UNST4221PL194020

Not yet decoded
Carriers run under2
22 mo
Inspections2
all-time
OOS inspections0
of 2
First seenDec 28, 2023
NC
Last seenOct 9, 2025
SC
Inspected under 2 different carriers in 22 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
1UN

Deterministic · VIN positions 1–3.

Vehicle descriptor section
ST422

Deterministic · VIN positions 4–8.

Check digit
1 · valid

Deterministic · position 9; calculated value 1.

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
194020

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.

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 · Dec 28, 2023 – Oct 9, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
Oct 9, 2025SCIII · Driver-only0TN SOLUTIONS INC 4209882DA64971/NC
Dec 28, 2023NCIII · Driver-only0ZEBRA ENVIRONMENTAL & INDUSTRIAL SERVICES INC 1359194DA64971/NC
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
TN SOLUTIONS INC4209882Oct 9, 2025Oct 9, 20251NC
ZEBRA ENVIRONMENTAL & INDUSTRIAL SERVICES INC1359194Dec 28, 2023Dec 28, 20231NC
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.
DA64971NCTN SOLUTIONS INCOct 9, 2025Oct 9, 20251
DA64971NCZEBRA ENVIRONMENTAL & INDUSTRIAL SERVICES INCDec 28, 2023Dec 28, 20231
Sources: FMCSA SAFER · L&I · NHTSA vPIC