Equipment unit · VIN-decoded · NHTSA vPIC

2022 Bison Hooklift Systems

4B9B7F62XNA220026 · Trailer · TRAILER
Carriers run under2
23 mo
Inspections2
all-time
OOS inspections1
of 2
First seenNov 20, 2023
PA
Last seenOct 14, 2025
PA
Inspected under 2 different carriers in 23 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
4B9B7F62XNA220026
Make
Bison Hooklift Systems
Model
Bison Hooklift Systems
Model year
2022
Body class
Trailer
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Sep 20, 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
4B9

Deterministic · VIN positions 1–3.

Source · 49 CFR Part 565 ↗
Vehicle descriptor section
B7F62

Deterministic · VIN positions 4–8.

Source · 49 CFR Part 565 ↗
Check digit
X · valid

Deterministic · position 9; calculated value X.

Source · 49 CFR Part 565 ↗
Model year candidates
1992 or 2022

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

Source · 49 CFR Part 565 ↗
North American serial sequence
220026

Deterministic · positions 12–17 for a North American WMI.

Source · 49 CFR Part 565 ↗

Sourced platform inference

The prefix store publishes only at support ≥ 3 and purity ≥ 90%. Prefix confidence is shown beside every established platform claim.

Not established

No supported platform claim is established for this prefix

The resolver answered successfully but returned no row above the evidence floor. This does not mean the vehicle has no platform or that no data exists; it means this store cannot make the claim.

Not established

  • platform make
  • platform model
  • model line
  • generation
  • cab type

These are withheld claims, not negative findings.

02

Inspection history

Every roadside inspection of this VIN, newest first · Nov 20, 2023 – Oct 14, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
Oct 14, 2025PAII · Walk-around2OOSZAJAC SERVICES LLC 3708756XPZ0350/PA
Nov 20, 2023PAI · Full0—DAVID APPEL 2543658PT173M4/PA
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
ZAJAC SERVICES LLC3708756Oct 14, 2025Oct 14, 20251PA
DAVID APPEL2543658Nov 20, 2023Nov 20, 20231PA
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.
XPZ0350PA—ZAJAC SERVICES LLCOct 14, 2025 → Oct 14, 20251
PT173M4PA—DAVID APPELNov 20, 2023 → Nov 20, 20231
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Sep 20, 2026