Equipment unit · VIN-decoded · NHTSA vPIC

2022 Doonan Specialized Trailer

1D9BG4828N1609580 · Trailer · TRAILER
Carriers run under3
14 mo
Inspections3
all-time
OOS inspections1
of 3
First seenNov 6, 2024
AZ
Last seenJan 21, 2026
CA
Inspected under 3 different carriers in 14 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
1D9BG4828N1609580
Make
Doonan Specialized Trailer
Model
Doonan Specialized Trailer
Model year
2022
Body class
Trailer
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Jul 19, 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
1D9

Deterministic · VIN positions 1–3.

Vehicle descriptor section
BG482

Deterministic · VIN positions 4–8.

Check digit
8 · valid

Deterministic · position 9; calculated value 8.

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
609580

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
DOONAN SPECIALIZED TRAILER

Prefix basis · 127 decoded VINs at 99.2% prefix purity.

Model
Doonan Specialized Trailer

Prefix basis · 127 decoded VINs at 99.2% 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
DOONAN SPECIALIZED TRAILER

Observed directly for this VIN via NHTSA vPIC.

Observed model
Doonan Specialized Trailer

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 · Nov 6, 2024 – Jan 21, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Jan 21, 2026CAI · Full2BILL POLKINHORN INCORPORATED 5063084WM9079/CA
Aug 13, 2025CAII · Walk-around0MAIN ELECTRIC SUPPLY COMPANY LLC 27416094WM9079/CA
Nov 6, 2024AZI · Full10OOSS&H SILVER TRUCKING LLC 15739734UZ9647/CA
03

Carriers this unit has run under

3 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
BILL POLKINHORN INCORPORATED506308Jan 21, 2026Jan 21, 20261CA
MAIN ELECTRIC SUPPLY COMPANY LLC2741609Aug 13, 2025Aug 13, 20251CA
S&H SILVER TRUCKING LLC1573973Nov 6, 2024Nov 6, 20241CA
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.
4WM9079CABILL POLKINHORN INCORPORATEDJan 21, 2026Jan 21, 20261
4WM9079CAMAIN ELECTRIC SUPPLY COMPANY LLCAug 13, 2025Aug 13, 20251
4UZ9647CAS&H SILVER TRUCKING LLCNov 6, 2024Nov 6, 20241
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jul 19, 2026