Equipment unit · VIN-decoded · NHTSA vPIC

2021 Carmex

3A9DM4837MG019095 · TRAILER
Carriers run under3
15 mo
Inspections13
all-time
OOS inspections3
of 13
First seenOct 4, 2023
TX
Last seenJan 30, 2025
TX
Inspected under 3 different carriers in 15 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
3A9DM4837MG019095
Make
Carmex
Model
Not decoded
Model year
2021
Body class
Not decoded
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Jun 16, 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
3A9

Deterministic · VIN positions 1–3.

Vehicle descriptor section
DM483

Deterministic · VIN positions 4–8.

Check digit
7 · valid

Deterministic · position 9; calculated value 7.

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
019095

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.

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
CARMEX

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
TRAILER

Observed directly for this VIN via NHTSA vPIC.

GVWR
Not established

Observed directly for this VIN via NHTSA vPIC.

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 · Oct 4, 2023 – Jan 30, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
Jan 30, 2025TXII · Walk-around2OOSROBERTO CARLOS ALVAREZ MARTINEZ 328259431UN8A/MX
Dec 26, 2024USI · Full3JESSICA LIZETH ACOSTA SANCHEZ 374789631UN8A/MX
Dec 19, 2024TXII · Walk-around0ROBERTO CARLOS ALVAREZ MARTINEZ 328259431UN8A/MX
Oct 17, 2024TXII · Walk-around6LUIS ALBERTO MELENDEZ MACIEL 374782231UN8A/MX
May 14, 2024TXI · Full4ROBERTO CARLOS ALVAREZ MARTINEZ 328259431UN8A/MX
May 10, 2024TXI · Full5LUIS ALBERTO MELENDEZ MACIEL 374782231UN8A/MX
May 7, 2024TXI · Full6OOSROBERTO CARLOS ALVAREZ MARTINEZ 328259431UN8A/MX
Dec 19, 2023TXI · Full5OOSLUIS ALBERTO MELENDEZ MACIEL 374782231UN8A/MX
Dec 12, 2023TXI · Full2ROBERTO CARLOS ALVAREZ MARTINEZ 328259431UN8A/MX
Nov 30, 2023TXI · Full0ROBERTO CARLOS ALVAREZ MARTINEZ 328259431UN8A/MX
Nov 13, 2023TXII · Walk-around0ROBERTO CARLOS ALVAREZ MARTINEZ 328259431UN8A/MX
Oct 25, 2023TXI · Full2ROBERTO CARLOS ALVAREZ MARTINEZ 328259431UN8A/MX
Oct 4, 2023TXI · Full1LUIS ALBERTO MELENDEZ MACIEL 374782231UN8A/MX
03

Carriers this unit has run under

3 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
ROBERTO CARLOS ALVAREZ MARTINEZ3282594Oct 25, 2023Jan 30, 20258TA
JESSICA LIZETH ACOSTA SANCHEZ3747896Dec 26, 2024Dec 26, 20241TA
LUIS ALBERTO MELENDEZ MACIEL3747822Oct 4, 2023Oct 17, 20244TA
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.
31UN8AMXROBERTO CARLOS ALVAREZ MARTINEZOct 25, 2023Jan 30, 20258
31UN8AMXJESSICA LIZETH ACOSTA SANCHEZDec 26, 2024Dec 26, 20241
31UN8AMXLUIS ALBERTO MELENDEZ MACIELOct 4, 2023Oct 17, 20244
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 16, 2026