Equipment unit · VIN-decoded · NHTSA vPIC

2022 Monroe Towmaster

4KNBT2729NL160653 · Trailer · TRAILER
Carriers run under1
29 mo
Inspections4
all-time
OOS inspections3
of 4
First seenSep 12, 2023
CA
Last seenFeb 27, 2026
CA
01

Decoded identity

From the 17-character VIN via NHTSA vPIC

VIN
4KNBT2729NL160653
Make
Monroe Towmaster
Model
Monroe Towmaster
Model year
2022
Body class
Trailer
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Jul 14, 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
BT272

Deterministic · VIN positions 4–8.

Check digit
9 · valid

Deterministic · position 9; calculated value 9.

Model year candidates
1992 or 2022

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

North American serial sequence
160653

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 · 6 decoded VINs at 100.0% prefix purity.

Model
Monroe Towmaster

Prefix basis · 6 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
2022

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

  • model line
  • generation
  • cab type

These are withheld claims, not negative findings.

02

Inspection history

Every roadside inspection of this VIN, newest first · Sep 12, 2023 – Feb 27, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Feb 27, 2026CAI · Full2OOSALTA CONCRETE INC 32938174UR9971/CA
Aug 13, 2025CAIII · Driver-only1ALTA CONCRETE INC 32938174UR9971/CA
May 19, 2025CAII · Walk-around3OOSALTA CONCRETE INC 32938174UR9971/CA
Sep 12, 2023CAII · Walk-around2OOSALTA CONCRETE INC 32938174UR9971/CA
03

Carriers this unit has run under

1 distinct carrier · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
ALTA CONCRETE INC3293817Sep 12, 2023Feb 27, 20264CA
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.
4UR9971CAALTA CONCRETE INCSep 12, 2023Feb 27, 20264
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jul 14, 2026