Equipment unit · VIN-decoded · NHTSA vPIC

3H4SL4320M3110252

Not yet decoded
Carriers run under2
18 mo
Inspections2
all-time
OOS inspections1
of 2
First seenJan 2, 2025
AR
Last seenJul 26, 2026
TX
Inspected under 2 different carriers in 18 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
3H4

Deterministic · VIN positions 1–3.

Vehicle descriptor section
SL432

Deterministic · VIN positions 4–8.

Check digit
0 · valid

Deterministic · position 9; calculated value 0.

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
110252

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
HEIL TRAILER INTERNATIONAL

Prefix basis · 5 decoded VINs at 100.0% prefix purity.

Model
Heil Trailer International

Prefix basis · 5 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 · Jan 2, 2025 – Jul 26, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Jul 26, 2026TXII · Walk-around4OOSNORMAN TRANSPORT INC 921422PT256321/AR
Jan 2, 2025ARIII · Driver-only0MISSION PETROLEUM CARRIERS INC 232937200C563/TX
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
NORMAN TRANSPORT INC921422Jul 26, 2026Jul 26, 20261AR
MISSION PETROLEUM CARRIERS INC232937Jan 2, 2025Jan 2, 20251TX
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.
PT256321AR2NORMAN TRANSPORT INCJul 26, 2026Jul 26, 20261
200C563TXMISSION PETROLEUM CARRIERS INCJan 2, 2025Jan 2, 20251
Sources: FMCSA SAFER · L&I · NHTSA vPIC