Equipment unit · VIN-decoded · NHTSA vPIC

4KNFF5333KL161964

Not yet decoded
Carriers run under1
33 mo
Inspections2
all-time
OOS inspections0
of 2
First seenJul 11, 2023
AK
Last seenApr 16, 2026
AK
01

Decoded identity

From the 17-character VIN via NHTSA vPIC

This VIN has not been decoded yet — the unit's carrier, inspection and plate history below is reconstructed from the FMCSA inspection feed regardless.

Decode evidence & sources

Deterministic structure

These fields come directly from VIN positions and the published checksum calculation, with zero store IO.

World manufacturer identifier
4KN

Deterministic · VIN positions 1–3.

Vehicle descriptor section
FF533

Deterministic · VIN positions 4–8.

Check digit
3 · valid

Deterministic · position 9; calculated value 3.

Model year candidates
1989 or 2019

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

North American serial sequence
161964

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
MONROE TOWMASTER

Prefix basis · 4 decoded VINs at 100.0% prefix purity.

Model
Monroe Towmaster

Prefix basis · 4 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.

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 · Jul 11, 2023 – Apr 16, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Apr 16, 2026AKIII · Driver-only2BLUE DIAMOND CONTRACTORS INC 38853725543SV/AK
Jul 11, 2023AKII · Walk-around1BLUE DIAMOND CONTRACTORS INC 38853722738SV/AK
03

Carriers this unit has run under

1 distinct carrier · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
BLUE DIAMOND CONTRACTORS INC3885372Jul 11, 2023Apr 16, 20262AK
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.
5543SVAKBLUE DIAMOND CONTRACTORS INCApr 16, 2026Apr 16, 20261
2738SVAKBLUE DIAMOND CONTRACTORS INCJul 11, 2023Jul 11, 20231
Sources: FMCSA SAFER · L&I · NHTSA vPIC