Equipment unit · VIN-decoded · NHTSA vPIC

2021 Freightliner Cascadia

3AKJHHDR0MSMZ6679 · Truck-Tractor · TRUCK
126Sleeper
Carriers run under2
36 mo
Inspections8
all-time
OOS inspections1
of 8
First seenAug 11, 2023
TN
Last seenAug 24, 2026
MN
Inspected under 2 different carriers in 36 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
3AKJHHDR0MSMZ6679
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 26, 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.

Source · 49 CFR Part 565 ↗
Vehicle descriptor section
JHHDR

Deterministic · VIN positions 4–8.

Source · 49 CFR Part 565 ↗
Check digit
0 · valid

Deterministic · position 9; calculated value 0.

Source · 49 CFR Part 565 ↗
Model year candidates
1991 or 2021

Position 10 repeats every 30 years; both candidates are retained and neither is silently selected.

Source · 49 CFR Part 565 ↗
North American serial sequence
MZ6679

Deterministic · positions 12–17 for a North American WMI.

Source · 49 CFR Part 565 ↗

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.

Source · Vektor corpus / NHTSA vPIC ↗
Model
Cascadia

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

Source · Vektor corpus / NHTSA vPIC ↗
Model line
126

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

Source · model-line evidence ↗
Generation
126

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

Source · generation evidence ↗
Cab type
Sleeper

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

Source · cab evidence ↗
02

Inspection history

Every roadside inspection of this VIN, newest first · Aug 11, 2023 – Aug 24, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Aug 24, 2026MNIII · Driver-only1—ROCK SOLID LOGISTICS INC 36950533613095/IN
Jul 25, 2026ILIII · Driver-only0—ROCK SOLID LOGISTICS INC 36950533613095/IN
May 2, 2026INIII · Driver-only1—ROCK SOLID LOGISTICS INC 36950533613095/IN
Jul 29, 2025TNII · Walk-around1OOSROCK SOLID LOGISTICS INC 36950533613095/IN
Jun 3, 2025ARII · Walk-around0—ROCK SOLID LOGISTICS INC 36950533613095/IN
Feb 7, 2024OKIII · Driver-only0—ROCK SOLID LOGISTICS INC 3695053P1225164/IL
Dec 14, 2023MIII · Walk-around1—ROCK SOLID LOGISTICS INC 3695053P1177347/IL
Aug 11, 2023TNI · Full0—DS1 LOGISTICS INC 2923266P1177347/IL
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
ROCK SOLID LOGISTICS INC3695053Dec 14, 2023Aug 24, 20267IN
DS1 LOGISTICS INC2923266Aug 11, 2023Aug 11, 20231IL
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.
3613095IN1ROCK SOLID LOGISTICS INCJun 3, 2025 → Aug 24, 20265
P1225164IL—ROCK SOLID LOGISTICS INCFeb 7, 2024 → Feb 7, 20241
P1177347IL—ROCK SOLID LOGISTICS INCDec 14, 2023 → Dec 14, 20231
P1177347IL—DS1 LOGISTICS INCAug 11, 2023 → Aug 11, 20231
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 26, 2026