Equipment unit · VIN-decoded · NHTSA vPIC

2021 Mertz Manufacturing Mertz Manufacturing, LLC

7KF1P4231MA000220 · Trailer · TRAILER
Carriers run under3
15 mo
Inspections3
all-time
OOS inspections0
of 3
First seenAug 8, 2024
OK
Last seenNov 28, 2025
TX
Inspected under 3 different carriers in 15 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
7KF1P4231MA000220
Make
Mertz Manufacturing
Model
Mertz Manufacturing, LLC
Model year
2021
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
7KF

Deterministic · VIN positions 1–3.

Vehicle descriptor section
1P423

Deterministic · VIN positions 4–8.

Check digit
1 · valid

Deterministic · position 9; calculated value 1.

Model year candidates
1991 or 2021

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

North American serial sequence
Not established

Not asserted outside North American WMIs; positions 12–17 may follow another regional convention.

No source established for this field.

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
2021

Observed directly for this VIN via NHTSA vPIC.

Observed make
MERTZ MANUFACTURING

Observed directly for this VIN via NHTSA vPIC.

Observed model
Mertz Manufacturing, LLC

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

  • serial sequence (positions 12–17 are only asserted for North American VINs)
  • 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 · Aug 8, 2024 – Nov 28, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
Nov 28, 2025TXII · Walk-around1NORTHWEST CONCRETE PRODUCTS INC 474106BZ3275/OK
Jul 24, 2025COIII · Driver-only1GRACE FREIGHT SYSTEMS INC 38702773156560/ME
Aug 8, 2024OKIII · Driver-only1NORTHWEST CRANE SERVICE LLC 999029BZ3275/OK
03

Carriers this unit has run under

3 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
NORTHWEST CONCRETE PRODUCTS INC474106Nov 28, 2025Nov 28, 20251OK
GRACE FREIGHT SYSTEMS INC3870277Jul 24, 2025Jul 24, 20251UT
NORTHWEST CRANE SERVICE LLC999029Aug 8, 2024Aug 8, 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.
BZ3275OKNORTHWEST CONCRETE PRODUCTS INCNov 28, 2025Nov 28, 20251
3156560MEGRACE FREIGHT SYSTEMS INCJul 24, 2025Jul 24, 20251
BZ3275OKNORTHWEST CRANE SERVICE LLCAug 8, 2024Aug 8, 20241
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Aug 9, 2026