Equipment unit · VIN-decoded · NHTSA vPIC

2021 Carmex

3A9DM4837MG019601 · TRAILER
Carriers run under3
19 mo
Inspections9
all-time
OOS inspections3
of 9
First seenMay 2, 2024
TX
Last seenDec 10, 2025
TX
Inspected under 3 different carriers in 19 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
3A9DM4837MG019601
Make
Carmex
Model
Not decoded
Model year
2021
Body class
Not decoded
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Jun 19, 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
019601

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 · May 2, 2024 – Dec 10, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
Dec 10, 2025TXII · Walk-around8OOSLUIS ALBERTO MELENDEZ MACIEL 374782260UK3D/MX
Jun 24, 2025USI · Full2OOSJESSICA LIZETH ACOSTA SANCHEZ 374789660UK3D/MX
Jun 24, 2025TXII · Walk-around6JESSICA LIZETH ACOSTA SANCHEZ 374789660UK3D/MX
Mar 24, 2025TXI · Full3ROBERTO CARLOS ALVAREZ MARTINEZ 328259460UK3D/MX
Aug 26, 2024TXI · Full3LUIS ALBERTO MELENDEZ MACIEL 374782260UK3D/MX
Aug 20, 2024USI · Full3ROBERTO CARLOS ALVAREZ MARTINEZ 328259460UK3D/MX
Jul 27, 2024TXIII · Driver-only4ROBERTO CARLOS ALVAREZ MARTINEZ 328259460UK3D/MX
May 21, 2024TXI · Full3OOSLUIS ALBERTO MELENDEZ MACIEL 374782260UK3D/MX
May 2, 2024TXI · Full4JESSICA LIZETH ACOSTA SANCHEZ 374789660UK30/MX
03

Carriers this unit has run under

3 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
LUIS ALBERTO MELENDEZ MACIEL3747822May 21, 2024Dec 10, 20253TA
JESSICA LIZETH ACOSTA SANCHEZ3747896May 2, 2024Jun 24, 20253TA
ROBERTO CARLOS ALVAREZ MARTINEZ3282594Jul 27, 2024Mar 24, 20253TA
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.
60UK3DMXLUIS ALBERTO MELENDEZ MACIELMay 21, 2024Dec 10, 20253
60UK3DMXJESSICA LIZETH ACOSTA SANCHEZJun 24, 2025Jun 24, 20252
60UK3DMXROBERTO CARLOS ALVAREZ MARTINEZJul 27, 2024Mar 24, 20253
60UK30MXJESSICA LIZETH ACOSTA SANCHEZMay 2, 2024May 2, 20241
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 19, 2026