Equipment unit · VIN-decoded · NHTSA vPIC

2012 Mississippi Tank Company

1M9AT9C23CH355311 · Trailer · TRAILER
Carriers run under2
25 mo
Inspections5
all-time
OOS inspections1
of 5
First seenJan 25, 2024
OK
Last seenFeb 11, 2026
OK
Inspected under 2 different carriers in 25 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
1M9AT9C23CH355311
Make
Mississippi Tank Company
Model
Mississippi Tank Company
Model year
2012
Body class
Trailer
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Jun 28, 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
1M9

Deterministic · VIN positions 1–3.

Vehicle descriptor section
AT9C2

Deterministic · VIN positions 4–8.

Check digit
3 · valid

Deterministic · position 9; calculated value 3.

Model year candidates
1982 or 2012

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

North American serial sequence
355311

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
MISSISSIPPI TANK COMPANY

Prefix basis · 92 decoded VINs at 100.0% prefix purity.

Model
Mississippi Tank Company

Prefix basis · 92 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
2012

Observed directly for this VIN via NHTSA vPIC.

Observed make
MISSISSIPPI TANK COMPANY

Observed directly for this VIN via NHTSA vPIC.

Observed model
Mississippi Tank Company

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
Not established

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 · Jan 25, 2024 – Feb 11, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Feb 11, 2026OKI · Full6GROENDYKE TRANSPORT INC 4247CB6347/OK
Feb 26, 2025OKII · Walk-around0GROENDYKE TRANSPORT INC 4247CB6347/OK
Apr 10, 2024OKII · Walk-around8OOSWEEKS BLADE SERVICES INC 1279445CB6347/OK
Feb 1, 2024OKII · Walk-around0GROENDYKE TRANSPORT INC 4247CB6347/OK
Jan 25, 2024OKII · Walk-around0GROENDYKE TRANSPORT INC 4247CB6347/OK
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
GROENDYKE TRANSPORT INC4247Jan 25, 2024Feb 11, 20264OK
WEEKS BLADE SERVICES INC1279445Apr 10, 2024Apr 10, 20241OK
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.
CB6347OK2GROENDYKE TRANSPORT INCJan 25, 2024Feb 11, 20264
CB6347OKWEEKS BLADE SERVICES INCApr 10, 2024Apr 10, 20241
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 28, 2026