Equipment unit · VIN-decoded · NHTSA vPIC

2021 Cal-Tex Trailers

4C9GF4024MM546121 · TRAILER
Carriers run under3
16 mo
Inspections6
all-time
OOS inspections5
of 6
First seenJun 3, 2024
MA
Last seenOct 22, 2025
TX
Inspected under 3 different carriers in 16 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
4C9GF4024MM546121
Make
Cal-Tex Trailers
Model
Not decoded
Model year
2021
Body class
Not decoded
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Jun 24, 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
4C9

Deterministic · VIN positions 1–3.

Vehicle descriptor section
GF402

Deterministic · VIN positions 4–8.

Check digit
4 · valid

Deterministic · position 9; calculated value 4.

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
546121

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
CAL-TEX TRAILERS

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 · Jun 3, 2024 – Oct 22, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
Oct 22, 2025TXI · Full4MICHAEL TRUCKING COMPANY LLC 4409277966733K/TX
Aug 23, 2025WYI · Full13OOSMICHAEL TRUCKING COMPANY LLC 4409277966733K/TX
Jul 26, 2025UTI · Full1OOSMICHAEL TRUCKING COMPANY LLC 4409277966733K/TX
May 21, 2025TNI · Full4OOSCHANGE LOGISTICS LLC 4204691966733K/TX
Oct 26, 2024TNI · Full3OOSCHANGE LOGISTICS LLC 4204691780947M/TX
Jun 3, 2024MAIII · Driver-only5OOSUS LINE LLC 4078814966733K/TX
03

Carriers this unit has run under

3 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
MICHAEL TRUCKING COMPANY LLC4409277Jul 26, 2025Oct 22, 20253TX
CHANGE LOGISTICS LLC4204691Oct 26, 2024May 21, 20252TX
US LINE LLC4078814Jun 3, 2024Jun 3, 20241TX
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.
966733KTXMICHAEL TRUCKING COMPANY LLCJul 26, 2025Oct 22, 20253
966733KTXCHANGE LOGISTICS LLCMay 21, 2025May 21, 20251
780947MTXCHANGE LOGISTICS LLCOct 26, 2024Oct 26, 20241
966733KTXUS LINE LLCJun 3, 2024Jun 3, 20241
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 24, 2026