Equipment unit · VIN-decoded · NHTSA vPIC

4S9V6TA20JG347221

Not yet decoded
Carriers run under4
22 mo
Inspections5
all-time
OOS inspections0
of 5
First seenDec 29, 2023
TX
Last seenOct 16, 2025
TX
Inspected under 4 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

VIN
4S9V6TA20JG347221
Make
Not decoded
Model
Not decoded
Model year
Body class
Not decoded
Vehicle type
Not decoded
GVWR
Not decoded
Decoded at
Jul 4, 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
4S9

Deterministic · VIN positions 1–3.

Vehicle descriptor section
V6TA2

Deterministic · VIN positions 4–8.

Check digit
0 · valid

Deterministic · position 9; calculated value 0.

Model year candidates
1988 or 2018

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

North American serial sequence
347221

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
SOUTHERN VAC TRAILERS LLC

Prefix basis · 13 decoded VINs at 100.0% prefix purity.

Model
Southern Vac Trailers LLC

Prefix basis · 13 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
Not established

Observed directly for this VIN via NHTSA vPIC.

Observed make
Not established

Observed directly for this VIN via NHTSA vPIC.

Observed model
Not established

Observed directly for this VIN via NHTSA vPIC.

Observed body class
Not established

Observed directly for this VIN via NHTSA vPIC.

Observed vehicle type
Not established

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 · Dec 29, 2023 – Oct 16, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
Oct 16, 2025TXIII · Driver-only2REDBIRD TRUCKING LLC 2263816135B295/TX
May 13, 2025TXI · Full3TEXAS MATERIALS GROUP INC 140721135B295/TX
Nov 22, 2024TXII · Walk-around0TEXAS MATERIALS GROUP INC 140721135B295/TX
Jan 3, 2024TXII · Walk-around0KH BROTHERS TRUCKING LLC 2554325135B295/TX
Dec 29, 2023TXII · Walk-around1LONE STAR CONCRETE LLC 3520989135B295/TX
03

Carriers this unit has run under

4 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
REDBIRD TRUCKING LLC2263816Oct 16, 2025Oct 16, 20251TX
TEXAS MATERIALS GROUP INC140721Nov 22, 2024May 13, 20252TX
KH BROTHERS TRUCKING LLC2554325Jan 3, 2024Jan 3, 20241TX
LONE STAR CONCRETE LLC3520989Dec 29, 2023Dec 29, 20231TX
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.
135B295TXREDBIRD TRUCKING LLCOct 16, 2025Oct 16, 20251
135B295TXTEXAS MATERIALS GROUP INCNov 22, 2024May 13, 20252
135B295TXKH BROTHERS TRUCKING LLCJan 3, 2024Jan 3, 20241
135B295TXLONE STAR CONCRETE LLCDec 29, 2023Dec 29, 20231
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jul 4, 2026