Equipment unit · VIN-decoded · NHTSA vPIC

2010 Road Builders Trailers Belly Dump

1W9SB4128AA258226 · Trailer · TRAILER
Carriers run under2
5 mo
Inspections3
all-time
OOS inspections2
of 3
First seenMay 8, 2024
TX
Last seenOct 15, 2024
TX
Inspected under 2 different carriers in 5 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
1W9SB4128AA258226
Make
Road Builders Trailers
Model
Belly Dump
Model year
2010
Body class
Trailer
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Jul 26, 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
1W9

Deterministic · VIN positions 1–3.

Vehicle descriptor section
SB412

Deterministic · VIN positions 4–8.

Check digit
8 · valid

Deterministic · position 9; calculated value 8.

Model year candidates
1980 or 2010

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

North American serial sequence
258226

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
ROAD BUILDERS TRAILERS

Prefix basis · 5 decoded VINs at 100.0% prefix purity.

Model
Belly Dump

Prefix basis · 5 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 · May 8, 2024 – Oct 15, 2024

DateStateLevelViol.OOSCarrier (DOT)Plate
Oct 15, 2024TXII · Walk-around2MAIRES TRUCKING LLC 4283115241C845/TX
Oct 9, 2024TXII · Walk-around5OOSMAIRES TRUCKING LLC 4283115241C845/TX
May 8, 2024TXII · Walk-around11OOSPP FREIGHT LLC 3986706241C845/TX
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
MAIRES TRUCKING LLC4283115Oct 9, 2024Oct 15, 20242TX
PP FREIGHT LLC3986706May 8, 2024May 8, 20241TX
Names are left-joined from the FMCSA census; a DOT with no census match falls back to its number.
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jul 26, 2026