Equipment unit · VIN-decoded · NHTSA vPIC

1995 Polar Tank Trailer

1PMS34422S1015949 · Trailer · TRAILER
Carriers run under2
13 mo
Inspections3
all-time
OOS inspections0
of 3
First seenApr 25, 2024
US
Last seenMay 7, 2025
CA
Inspected under 2 different carriers in 13 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
1PMS34422S1015949
Make
Polar Tank Trailer
Model
Polar Tank Trailer
Model year
1995
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
1PM

Deterministic · VIN positions 1–3.

Vehicle descriptor section
S3442

Deterministic · VIN positions 4–8.

Check digit
2 · valid

Deterministic · position 9; calculated value 2.

Model year candidates
1995 or 2025

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

North American serial sequence
015949

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
POLAR TANK TRAILER

Prefix basis · 67 decoded VINs at 100.0% prefix purity.

Model
Polar Tank Trailer

Prefix basis · 67 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
1995

Observed directly for this VIN via NHTSA vPIC.

Observed make
POLAR TANK TRAILER

Observed directly for this VIN via NHTSA vPIC.

Observed model
Polar Tank 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 · Apr 25, 2024 – May 7, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
May 7, 2025CAV · Vehicle-only0VENTURA TRANSFER COMPANY 574384RT6953/CA
Nov 21, 2024CAI · Full0TRANSNATIONAL LINE INC 20275944RT6953/CA
Apr 25, 2024USI · Full2TRANSNATIONAL LINE INC 20275944RT6953/CA
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
VENTURA TRANSFER COMPANY57438May 7, 2025May 7, 20251CA
TRANSNATIONAL LINE INC2027594Apr 25, 2024Nov 21, 20242CA
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.
4RT6953CA1VENTURA TRANSFER COMPANYMay 7, 2025May 7, 20251
4RT6953CATRANSNATIONAL LINE INCApr 25, 2024Nov 21, 20242
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jul 26, 2026