Equipment unit · VIN-decoded · NHTSA vPIC

2025 Silverback Trailer SILVERBACK

4S9GC4537SH623626 · Trailer · TRAILER
Carriers run under4
17 mo
Inspections8
all-time
OOS inspections1
of 8
First seenJan 22, 2025
OH
Last seenJun 26, 2026
MD
Inspected under 4 different carriers in 17 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
4S9GC4537SH623626
Make
Silverback Trailer
Model
SILVERBACK
Model year
2025
Body class
Trailer
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Jun 21, 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
4S9

Deterministic · VIN positions 1–3.

Vehicle descriptor section
GC453

Deterministic · VIN positions 4–8.

Check digit
7 · valid

Deterministic · position 9; calculated value 7.

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
623626

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.

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.

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
2025

Observed directly for this VIN via NHTSA vPIC.

Observed make
SILVERBACK TRAILER

Observed directly for this VIN via NHTSA vPIC.

Observed model
SILVERBACK

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

  • 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 · Jan 22, 2025 – Jun 26, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Jun 26, 2026MDI · Full0ZAK TRANSPORTS LLC 4501599C546384/ME
Feb 4, 2026MDI · Full0ZAK TRANSPORTS LLC 4501599C546384/ME
Nov 5, 2025MDII · Walk-around0CIRCLE 6 LOGISTICS OF PA LLC 3618726C546384/ME
Oct 23, 2025MDI · Full2CIRCLE 6 LOGISTICS OF PA LLC 3618726C546384/ME
Sep 4, 2025SCII · Walk-around8OOSJHP TRANSPORT LLC 2556107NO PLATE/PA
Jul 7, 2025MDII · Walk-around1CIRCLE 6 LOGISTICS OF PA LLC 3618726UNREGISTERED/PA
Jan 23, 2025TNI · Full2BUR TRANSPORTATION INC 3539655XRC5224/UK
Jan 22, 2025OHIII · Driver-only4BUR TRANSPORTATION INC 3539655XRC5224/PA
03

Carriers this unit has run under

4 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
ZAK TRANSPORTS LLC4501599Feb 4, 2026Jun 26, 20262MD
CIRCLE 6 LOGISTICS OF PA LLC3618726Jul 7, 2025Nov 5, 20253PA
JHP TRANSPORT LLC2556107Sep 4, 2025Sep 4, 20251MD
BUR TRANSPORTATION INC3539655Jan 22, 2025Jan 23, 20252WI
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.
C546384ME2ZAK TRANSPORTS LLCFeb 4, 2026Jun 26, 20262
C546384MECIRCLE 6 LOGISTICS OF PA LLCOct 23, 2025Nov 5, 20252
NO PLATEPAJHP TRANSPORT LLCSep 4, 2025Sep 4, 20251
UNREGISTEREDPACIRCLE 6 LOGISTICS OF PA LLCJul 7, 2025Jul 7, 20251
XRC5224UKBUR TRANSPORTATION INCJan 23, 2025Jan 23, 20251
XRC5224PABUR TRANSPORTATION INCJan 22, 2025Jan 22, 20251
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 21, 2026