Equipment unit · VIN-decoded · NHTSA vPIC

2021 Freightliner Cascadia

3AKJHHDR8MSMZ6669 · Truck-Tractor · TRUCK
126Sleeper
Carriers run under2
23 mo
Inspections7
all-time
OOS inspections4
of 7
First seenNov 6, 2023
SD
Last seenOct 13, 2025
TN
Inspected under 2 different carriers in 23 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
3AKJHHDR8MSMZ6669
Make
Freightliner
Model
Cascadia
Model year
2021
Body class
Truck-Tractor
Vehicle type
TRUCK
GVWR
Class 8: 33,001 lb and above (14,969 kg and above)
Decoded at
Jun 21, 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
3AK

Deterministic · VIN positions 1–3.

Vehicle descriptor section
JHHDR

Deterministic · VIN positions 4–8.

Check digit
8 · valid

Deterministic · position 9; calculated value 8.

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
MZ6669

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
FREIGHTLINER

Prefix basis · 146,134 decoded VINs at 100.0% prefix purity.

Model
Cascadia

Prefix basis · 146,134 decoded VINs at 100.0% prefix purity.

Model line
126

Sourced label · prefix basis 146,134 decoded VINs at 100.0% prefix purity.

Generation
126

Sourced label · prefix basis 146,134 decoded VINs at 100.0% prefix purity.

Cab type
Sleeper

Sourced label · prefix basis 146,134 decoded VINs at 100.0% prefix purity.

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
FREIGHTLINER

Observed directly for this VIN via NHTSA vPIC.

Observed model
Cascadia

Observed directly for this VIN via NHTSA vPIC.

Observed body class
Truck-Tractor

Observed directly for this VIN via NHTSA vPIC.

Observed vehicle type
TRUCK

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.

02

Inspection history

Every roadside inspection of this VIN, newest first · Nov 6, 2023 – Oct 13, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
Oct 13, 2025TNI · Full1OOSROCK SOLID LOGISTICS INC 36950533644436/IN
Feb 20, 2025OHIII · Driver-only0ROCK SOLID LOGISTICS INC 36950533644436/IN
Dec 28, 2024ILIII · Driver-only1ROCK SOLID LOGISTICS INC 36950533644436/IN
Aug 20, 2024INIII · Driver-only1ROCK SOLID LOGISTICS INC 36950533644436/IN
May 17, 2024TXII · Walk-around4OOSROCK SOLID LOGISTICS INC 3695053P1106890/IL
Feb 18, 2024MAIII · Driver-only4OOSDS1 LOGISTICS INC 2923266P1106890/IL
Nov 6, 2023SDIII · Driver-only1OOSDS1 LOGISTICS INC 2923266P1106890/IL
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
ROCK SOLID LOGISTICS INC3695053May 17, 2024Oct 13, 20255IN
DS1 LOGISTICS INC2923266Nov 6, 2023Feb 18, 20242IL
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.
3644436INROCK SOLID LOGISTICS INCAug 20, 2024Oct 13, 20254
P1106890ILROCK SOLID LOGISTICS INCMay 17, 2024May 17, 20241
P1106890ILDS1 LOGISTICS INCNov 6, 2023Feb 18, 20242
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 21, 2026