Equipment unit · VIN-decoded · NHTSA vPIC

2006 West-Mark Certified Stainless Services, Inc dba West-Mark

16WTB40246A135596 · Trailer · TRAILER
Carriers run under2
28 mo
Inspections6
all-time
OOS inspections1
of 6
First seenMar 22, 2024
CA
Last seenJul 28, 2026
CA
Inspected under 2 different carriers in 28 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
16WTB40246A135596
Make
West-Mark
Model
Certified Stainless Services, Inc dba West-Mark
Model year
2006
Body class
Trailer
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Jun 27, 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
16W

Deterministic · VIN positions 1–3.

Vehicle descriptor section
TB402

Deterministic · VIN positions 4–8.

Check digit
4 · valid

Deterministic · position 9; calculated value 4.

Model year candidates
2006 or 2036

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

North American serial sequence
135596

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
WEST-MARK

Prefix basis · 13 decoded VINs at 100.0% prefix purity.

Model
Certified Stainless Services, Inc dba West-Mark

Prefix basis · 13 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
2006

Observed directly for this VIN via NHTSA vPIC.

Observed make
WEST-MARK

Observed directly for this VIN via NHTSA vPIC.

Observed model
Certified Stainless Services, Inc dba West-Mark

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 · Mar 22, 2024 – Jul 28, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Jul 28, 2026CAII · Walk-around1QUAIL CANYON TRANSPORT INC 24344204VV2642/CA
Nov 5, 2025CAI · Full0QUAIL CANYON TRANSPORT INC 24344204VV2642/CA
Sep 12, 2025CAII · Walk-around0QUAIL CANYON TRANSPORT INC 24344204VV2642/CA
Jul 23, 2025CAII · Walk-around1OOSQUAIL CANYON TRANSPORT INC 24344204VV2642/CA
Aug 16, 2024CAI · Full0QUAIL CANYON TRANSPORT INC 24344204VV2642/CA
Mar 22, 2024CAI · Full0PETROL TRANSPORT INC 10761874VV2642/CA
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
QUAIL CANYON TRANSPORT INC2434420Aug 16, 2024Jul 28, 20265CA
PETROL TRANSPORT INC1076187Mar 22, 2024Mar 22, 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.
4VV2642CA2QUAIL CANYON TRANSPORT INCAug 16, 2024Jul 28, 20265
4VV2642CAPETROL TRANSPORT INCMar 22, 2024Mar 22, 20241
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 27, 2026