Equipment unit · VIN-decoded · NHTSA vPIC

2025 Monroe Towmaster

4KNBD1728SL160727 · Trailer · TRAILER
Carriers run under1
14 mo
Inspections3
all-time
OOS inspections2
of 3
First seenMay 1, 2025
CA
Last seenJul 25, 2026
CA
01

Decoded identity

From the 17-character VIN via NHTSA vPIC

VIN
4KNBD1728SL160727
Make
Monroe Towmaster
Model
Monroe Towmaster
Model year
2025
Body class
Trailer
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Aug 9, 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
4KN

Deterministic · VIN positions 1–3.

Vehicle descriptor section
BD172

Deterministic · VIN positions 4–8.

Check digit
8 · valid

Deterministic · position 9; calculated value 8.

Model year candidates
1995 or 2025

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

North American serial sequence
160727

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.

Not established

No supported platform claim is established for this prefix

The resolver answered successfully but returned no row above the evidence floor. This does not mean the vehicle has no platform or that no data exists; it means this store cannot make the claim.

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
2025

Observed directly for this VIN via NHTSA vPIC.

Observed make
MONROE TOWMASTER

Observed directly for this VIN via NHTSA vPIC.

Observed model
Monroe Towmaster

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

  • platform make
  • platform model
  • model line
  • generation
  • cab type

These are withheld claims, not negative findings.

02

Inspection history

Every roadside inspection of this VIN, newest first · May 1, 2025 – Jul 25, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Jul 25, 2026CAII · Walk-around2OOSHOT LINE CONSTRUCTION INC 22568834WS3966/CA
Jan 12, 2026CAII · Walk-around1HOT LINE CONSTRUCTION INC 22568834WS3966/CA
May 1, 2025CAII · Walk-around5OOSHOT LINE CONSTRUCTION INC 2256883T087673/CA
03

Carriers this unit has run under

1 distinct carrier · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
HOT LINE CONSTRUCTION INC2256883May 1, 2025Jul 25, 20263CA
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.
4WS3966CA2HOT LINE CONSTRUCTION INCJan 12, 2026Jul 25, 20262
T087673CAHOT LINE CONSTRUCTION INCMay 1, 2025May 1, 20251
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Aug 9, 2026