Carrier profile · USDOT 3765638 · Updated Aug 20, 2026

Mason Supply Source LLC

DBA STONEWORKS

2 power unitsavg 19.5 yrLocal · 1 statesISLANDIA, NY81/100

AUTHORITY STATUS UNKNOWN

Observed fleet · trailing 24 mo daily

2Power units

2 observed · MCS-150

—Trailers seen

None observed · 24 mo

19.5Avg age (yr)

2006–2007 · vPIC

Call dispatch(631) 273-3323 Email dispatchvictor@9brothersbuilding.com

Click to see how we scored it

Load decision · FMCSA snapshot · Aug 20, 2026

Review before loading

Operating, but with flags a broker should weigh before tendering freight.

Watch · 2

Vehicle out-of-service rate above average33.3% vs the 22.26% national average.Driver out-of-service rate well above average14.3% of driver inspections were placed out of service vs the 6.7% national average.

In good standing · 1

No reported crashesNo DOT-reportable crashes are on this carrier's record.

USDOT registration

yr registered

Authority not on file

Insurance (BIPD)— unknown

No filing on record

Vehicle OOS · 24-mo33.3%

▲ 22.26% nat'l

Crashes · fatal

Clean · 24 mo

USDOT registration

yr registered

Authority not on file

Insurance (BIPD)— unknown

No filing on record

Vehicle OOS · 24-mo33.3%

▲ 22.26% nat'l

Crashes · fatal

Clean · 24 mo

Vektor intelligence · beyond the federal recordProprietary signals computed from VIN-decoded inspections & daily FMCSA snapshots

Fleet typeIdentity

Owner-operator

2 power units. Brokers price each fleet type apart.

Fleet age vs peersOlder

19.5 yr

Model years 2006–2007 · peer benchmark unavailable.

Identity stabilityStable

4 yr unchanged

Same registration since 2021 — no chameleon / reincarnation signal.

Safety

7 inspections · 24 mo · vs national benchmarks

Out-of-service rate· 24-mo cumulative · vs national

Vehicle OOS 33.3%24-mo cumulative

050%nat'l 22.26%

Driver OOS 14.3%24-mo cumulative

030%nat'l 6.67%

Every inspection in the window pooled — 6 vehicle and 7 driver inspections over 24 months.

Vehicle OOS rate· vehicle OOS · vehicle-level inspections · 6-month trailing

33.3% · latest 6-mo window● Steady

Share of vehicle-level roadside inspections in each trailing six-month window that resulted in a vehicle out-of-service order. Holding steady across the window. The national vehicle benchmark uses the same metric and is shown on the chart.

Roadside inspection history· 24 charted calendar months · vehicle / driver level · any-OOS overlay

7 inspections in the charted months · busiest month Aug '26 · 2

Vehicle-levelDriver-levelAny OOS

Monthly FMCSA roadside inspections across the 24 charted calendar months. Bars show level-qualified vehicle and driver populations; one inspection can qualify for both. The line shows inspections with any out-of-service result.

Inspection coverage· expected vs observed · the fraud signal

Inspection coverage

How heavily FMCSA inspects this fleet for its size — it tells you how much to trust the safety signals above. Thin coverage on a young authority is a fraud signal nobody else surfaces.

Heavily inspected

Under-inspected

Expected

Well-monitored

Heavily inspected

≈1.8 / unit·yr

thin signalabundant signal

Among the more heavily-inspected carriers for its size — abundant roadside signal. Coverage isn't the question here; the out-of-service and crash record is.

Registered power units: 2
Inspections · 24 mo: 7
Annualized: ≈4 / yr
Coverage: ≈1.8 inspections / unit · yr

Violation themes· decoded · grouped by BASIC

What this carrier actually gets cited for — FMCSA violation codes decoded into plain English, ranked by frequency.

391.41 No / expired medical certificateDriver Fitness2 · 1 OOS
393.11 Required lamps/reflectors missingVehicle Maintenance1 · 0 OOS
391.11 Driver not qualifiedDriver Fitness1 · 1 OOS
393.60 Windshield / glazingVehicle Maintenance1 · 0 OOS
393.9 Inoperative required lampsVehicle Maintenance1 · 0 OOS
393.95 Emergency equipment (extinguisher, triangles)Vehicle Maintenance1 · 0 OOS
393.41 Parts & accessories (vehicle condition)Vehicle Maintenance1 · 1 OOS

Explore full safety record — inspections, BASICs, crashes

Authority & Insurance

Can they legally + adequately haul your load?

Insurance continuity· insurer · policy · lapses

No insurance filing history on record.

This timeline is the FMCSA filing history, and it ends at the most recent superseded filing — current policy status is not tracked here. Request a certificate of insurance to confirm active coverage before tendering.

Explore full authority & insurance record

Equipment

VIN-decoded · NHTSA vPIC

Capacity· power units = haulable capacity; trailers are towed

Registered power units (MCS-150): 2
Observed power (24 mo): 2
Trailers (towed): 0

Capacity is power units only — trailers are towed equipment and are never summed into a fleet-size figure.

Fleet age· model years · decoded VINs

19.5 yr

Average age

2007

Newest model yr

2006

Oldest model yr

100.0%

VINs decoded

Explore full fleet — VIN roster, equipment mix, age distribution

Operations & Lanes

Revealed by inspection density across 1 states · 24 mo

Operating footprint· revealed by roadside-inspection geography

Operating radiusLocal

revealed

States observed

US states

Inspections · 24 mo

NY busiest

Inspection density by state· each tile = a state · shade = inspections, last 24 mo

Home base

ISLANDIA, NY

163-165 BRIDGE RD STE 100

Top corridor

NY 7

Density

fewermore

Shade = roadside inspections, last 24 mo.

See the full operating map — state density, top lanes

Network & Fraud

Affiliated entities & reincarnation signals · for review, not a verdict

Shares a registration email domain with other carriers

@9brothersbuilding.com — 2 carriers: USDOT 1144895

Shares a company officer with other carriers

tony palmieri — 3 carriers: USDOT 895707 USDOT 1144895

Capacity consistency· registered vs roadside-observed power units

Registered (MCS-150)

Observed (24 mo)

Registered and roadside-observed capacity are broadly consistent.

Explore the carrier network & VIN cross-links

Identity & Federal

FMCSA census + L&I dossier

Location

Physical address: 163-165 BRIDGE RD STE 100, ISLANDIA, NY, 11749
Operation: Intrastate (Non-Hazmat)

Contact

Phone: (631) 273-3323
Fax: (631) 273-3457
Email: victor@9brothersbuilding.com
Web domain: 9brothersbuilding.com

Registration

Officer: Tony Palmieri
USDOT / docket: 3765638
First registered: Nov 16, 2021
Last MCS-150: Apr 13, 2026 · 20,000 mi (2025)
FMCSA safety rating: Not rated
D-U-N-S: —

Fleet (self-reported · MCS-150)

Power units

Drivers

—CDL drivers

20,000

Annual mileage

Open the full identity & federal record

Federal activity

Daily-captured FMCSA licensing & insurance changes — monitored by Vektor

Federal record activity· monitored daily by Vektor

No licensing or insurance changes captured since Vektor began monitoring this carrier (June 2026). Quiet is usually good.

Open the full federal-record activity feed

Reviews

Verified broker, shipper & driver reviews — moderated

Performance ratings only — never the Vektor risk score

No verified reviews yet

Be the first broker or shipper to rate MASON SUPPLY SOURCE LLC. Reviews cover performance only — on-time delivery, payment speed, communication — and never affect the Vektor risk score.

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Verification summaryAuthority, insurance, safety and identity facts for MASON SUPPLY SOURCE LLC.

MASON SUPPLY SOURCE LLC (USDOT 3765638) has a Vektor safety score of 81/100 and a Review before loading verdict, from the carrier's FMCSA record refreshed Aug 20, 2026.

The carrier has an unknown current for-hire authority status because no FMCSA L&I authority row is available as of Aug 20, 2026.

It has an unknown current BIPD insurance status because no FMCSA L&I active-filing snapshot is available as of Aug 20, 2026.

Its vehicle out-of-service rate was 33.3% over the last 24 months, versus the 22.26% CVSA national average, from FMCSA roadside-inspection data refreshed Aug 20, 2026.

The carrier received 7 roadside inspections in the last 24 months — 6 vehicle-level and 7 driver-level — across 1 state, according to FMCSA roadside-inspection data refreshed Aug 20, 2026.

The carrier has 0 reportable crashes in the last 24 months and 0 fatal crashes across the full FMCSA crash record available as of Aug 20, 2026.

It reports 2 power units and 1 driver in its most recent MCS-150 filing dated Apr 13, 2026.

It has no FMCSA-assigned safety rating in the federal record refreshed Aug 20, 2026.

Frequently asked

What is MASON SUPPLY SOURCE LLC's USDOT number?

MASON SUPPLY SOURCE LLC's USDOT number is 3765638.

Is MASON SUPPLY SOURCE LLC authorized to operate?

As of Aug 20, 2026, MASON SUPPLY SOURCE LLC is active in the FMCSA register.

What is MASON SUPPLY SOURCE LLC's safety record?

MASON SUPPLY SOURCE LLC has a 33.3% vehicle out-of-service rate (national average 22.26%) across 10 roadside inspections, with 0 reportable crashes in the last 24 months, and is not currently rated by FMCSA. Vektor's computed risk score is 81/100 (tier: review).

How big is MASON SUPPLY SOURCE LLC's fleet?

MASON SUPPLY SOURCE LLC operates 2 power units and 1 driver per its most recent MCS-150 filing.

Where is MASON SUPPLY SOURCE LLC based?

MASON SUPPLY SOURCE LLC is based in ISLANDIA, NY, with roadside inspections recorded across 1 state.

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