Equipment unit · VIN-decoded · NHTSA vPIC

2021 Mac

558MCC325MX006345 · Trailer · TRAILER
Carriers run under2
30 mo
Inspections5
all-time
OOS inspections0
of 5
First seenNov 30, 2023
OK
Last seenMay 7, 2026
NM
Inspected under 2 different carriers in 30 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
558MCC325MX006345
Make
Mac
Model
MAC
Model year
2021
Body class
Trailer
Vehicle type
TRAILER
GVWR
Class 8: 33,001 lb and above (14,969 kg and above)
Decoded at
Jul 5, 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
558

Deterministic · VIN positions 1–3.

Vehicle descriptor section
MCC32

Deterministic · VIN positions 4–8.

Check digit
5 · valid

Deterministic · position 9; calculated value 5.

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
006345

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
MAC

Prefix basis · 15 decoded VINs at 100.0% prefix purity.

Model
MAC

Prefix basis · 15 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
2021

Observed directly for this VIN via NHTSA vPIC.

Observed make
MAC

Observed directly for this VIN via NHTSA vPIC.

Observed model
MAC

Observed directly for this VIN via NHTSA vPIC.

Observed body class
Trailer

Observed directly for this VIN via NHTSA vPIC.

Observed vehicle type
TRAILER

Observed directly for this VIN via NHTSA vPIC.

GVWR
Class 8: 33,001 lb and above (14,969 kg and above)

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 · Nov 30, 2023 – May 7, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
May 7, 2026NMII · Walk-around0ACORD TRANSPORTATION INC 201153AY2531/OK
Apr 15, 2026TXII · Walk-around0ACORD TRANSPORTATION INC 201153AY2531/OK
Feb 11, 2026OKI · Full4DIAMOND TRUCKING INC 491637AY2531/OK
Nov 5, 2025KSI · Full1ACORD TRANSPORTATION INC 201153AY2531/OK
Nov 30, 2023OKII · Walk-around0ACORD TRANSPORTATION INC 201153AY2531/OK
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
ACORD TRANSPORTATION INC201153Nov 30, 2023May 7, 20264OK
DIAMOND TRUCKING INC491637Feb 11, 2026Feb 11, 20261AZ
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.
AY2531OKACORD TRANSPORTATION INCNov 30, 2023May 7, 20264
AY2531OKDIAMOND TRUCKING INCFeb 11, 2026Feb 11, 20261
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jul 5, 2026