Equipment unit · VIN-decoded · NHTSA vPIC

1S9LS4836K1260887

Not yet decoded
Carriers run under2
32 mo
Inspections2
all-time
OOS inspections1
of 2
First seenNov 14, 2023
NH
Last seenJul 27, 2026
ME
Inspected under 2 different carriers in 32 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
1S9

Deterministic · VIN positions 1–3.

Vehicle descriptor section
LS483

Deterministic · VIN positions 4–8.

Check digit
6 · valid

Deterministic · position 9; calculated value 6.

Model year candidates
1989 or 2019

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

North American serial sequence
260887

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
STAIRS

Prefix basis · 34 decoded VINs at 100.0% prefix purity.

Model
Stairs

Prefix basis · 34 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 · Nov 14, 2023 – Jul 27, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Jul 27, 2026MEII · Walk-around6OOSDYLAN FORTIN 3622248C478220/ME
Nov 14, 2023NHIII · Driver-only1ROBERT W LIBBY AND SONS INC 288481B847081/ME
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
DYLAN FORTIN3622248Jul 27, 2026Jul 27, 20261ME
ROBERT W LIBBY AND SONS INC288481Nov 14, 2023Nov 14, 20231ME
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.
C478220ME2DYLAN FORTINJul 27, 2026Jul 27, 20261
B847081MEROBERT W LIBBY AND SONS INCNov 14, 2023Nov 14, 20231
Sources: FMCSA SAFER · L&I · NHTSA vPIC