Equipment unit · VIN-decoded · NHTSA vPIC

4S9KC533XRH623519

Not yet decoded
Carriers run under2
2 mo
Inspections2
all-time
OOS inspections1
of 2
First seenApr 25, 2026
OK
Last seenJun 23, 2026
PA
Inspected under 2 different carriers in 2 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

This VIN has not been decoded yet — the unit's carrier, inspection and plate history below is reconstructed from the FMCSA inspection feed regardless.

Decode evidence & sources

Deterministic structure

These fields come directly from VIN positions and the published checksum calculation, with zero store IO.

World manufacturer identifier
4S9

Deterministic · VIN positions 1–3.

Vehicle descriptor section
KC533

Deterministic · VIN positions 4–8.

Check digit
X · valid

Deterministic · position 9; calculated value X.

Model year candidates
1994 or 2024

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

North American serial sequence
623519

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
SILVERBACK TRAILER

Prefix basis · 18 decoded VINs at 100.0% prefix purity.

Model
SILVERBACK

Prefix basis · 18 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 · Apr 25, 2026 – Jun 23, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Jun 23, 2026PAIII · Driver-only6QDPT CARGO LLC 4538979990360ST/IL
Apr 25, 2026OKI · Full7OOSROYAL HAULING GROUP CORP 4410856990360ST/IL
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
QDPT CARGO LLC4538979Jun 23, 2026Jun 23, 20261IL
ROYAL HAULING GROUP CORP4410856Apr 25, 2026Apr 25, 20261IL
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.
990360STIL2QDPT CARGO LLCJun 23, 2026Jun 23, 20261
990360STILROYAL HAULING GROUP CORPApr 25, 2026Apr 25, 20261
Sources: FMCSA SAFER · L&I · NHTSA vPIC