Fleet typeIdentity
Owner-operator
1 power unit. Brokers price each fleet type apart.
Carrier profile · USDOT 3973586 · MC-1485611 · Updated Jun 13, 2026
4J DIAZ TRANSPORT LLC
1 power unitFONTANA, CA50/100
CARRIER INACTIVEMC-1485611 INACTIVE
Observed fleet · trailing 24 mo daily
1Power units
Self-reported · MCS-150
—Trailers seen
None observed · 24 mo
—Avg age (yr)
Not yet decoded
Click to see how we scored it
Load decision · FMCSA snapshot · Jun 13, 2026
Limited record
Not enough federal record to assess. Verify authority and insurance directly.
USDOT registration inactive
Watch · 4
USDOT registration inactiveThe USDOT record is flagged inactive — the carrier may not be authorized to operate.No active operating authorityNo active common, contract, or broker authority is on file for a for-hire carrier.No inspection history despite active fleetAn established carrier reporting 1 power units has no roadside inspections — a common shell/paper-carrier signal.MCS-150 census data outdatedThe biennial MCS-150 update is 3.8 years old; fleet/mileage figures may be unreliable.
In good standing · 0
Nothing flagged.
USDOT registration33 yr registered
No active authorityInsurance (BIPD)— unknown
No filing on recordVehicle OOS · 24-mo—
No inspections · 24 moCrashes · fatal—
No crash recordVektor intelligence · beyond the federal recordProprietary signals computed from VIN-decoded inspections & daily FMCSA snapshots
Fleet age vs peersDecoding
—
Not yet decoded
Identity stabilityStable
3 yr unchanged
Same registration since 2022 — no chameleon / reincarnation signal.
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Verification summary
4J DIAZ TRANSPORT LLC (USDOT 3973586) is unrated by Vektor because the carrier's FMCSA record does not contain enough evidence for a safety score as of Jun 13, 2026.
The carrier has no active for-hire operating authority per FMCSA L&I as of Jun 13, 2026.
It has an unknown current BIPD insurance status because no FMCSA L&I active-filing snapshot is available as of Jun 13, 2026.
The carrier received 0 roadside inspections in the last 24 months — 0 vehicle-level and 0 driver-level, according to FMCSA roadside-inspection data refreshed Jun 13, 2026.
It reports 1 power unit and 1 driver in its most recent MCS-150 filing dated Oct 20, 2022.
It has no FMCSA-assigned safety rating in the federal record refreshed Jun 13, 2026.
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Frequently asked
What is 4J DIAZ TRANSPORT LLC's USDOT number?
4J DIAZ TRANSPORT LLC's USDOT number is 3973586, and its motor carrier number is MC-1485611.
Is 4J DIAZ TRANSPORT LLC authorized to operate?
As of Jun 13, 2026, 4J DIAZ TRANSPORT LLC is inactive in the FMCSA register with common, contract, broker operating authority on file.
How big is 4J DIAZ TRANSPORT LLC's fleet?
4J DIAZ TRANSPORT LLC operates 1 power unit and 1 driver per its most recent MCS-150 filing.
Where is 4J DIAZ TRANSPORT LLC based?
4J DIAZ TRANSPORT LLC is based in FONTANA, CA.
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