Carrier profile · USDOT 348981 · Updated Jun 13, 2026

W B MASON CO INC

834 power unitsavg 3.4 yrNational · 21 statesBROCKTON, MA88/100

AUTHORITY STATUS UNKNOWNRATED CONDITIONALHAZMAT

Observed fleet · trailing 24 mo daily

834Power units

305 observed · MCS-150

41Trailers seen

Decoded · vPIC

3.4Avg age (yr)

2001–2026 · vPIC

Call dispatch(617) 510-7830 Email dispatchjohn.burns@wbmason.com

Click to see how we scored it

Load decision · FMCSA snapshot · Jun 13, 2026

Clear to load

Clear under the current scoring — review the flagged signal below before loading.

Established 37 yearsOut-of-service rates below national averageFatal crash on record

Watch · 1

Fatal crash on record7 crash(es) involving a fatality are on this carrier's record.

In good standing · 2

Established 37 yearsOperating authority has been on file since 1989.Out-of-service rates below national averageBoth vehicle and driver OOS rates beat the national benchmark across 773 inspections.

USDOT registration

yr registered

Authority not on file

Insurance (BIPD)— unknown

No filing on record

Vehicle OOS · 24-mo11.2%

▼ 22.26% nat'l

Crashes · fatal

14 in 24 mo

USDOT registration

yr registered

Authority not on file

Insurance (BIPD)— unknown

No filing on record

Vehicle OOS · 24-mo11.2%

▼ 22.26% nat'l

Crashes · fatal

14 in 24 mo

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

Fleet typeIdentity

Asset-based

834 power units. Brokers price each fleet type apart.

Fleet age vs peersNewer

3.4 yr

Model years 2001–2026 · peer benchmark unavailable.

Identity stabilityStable

37 yr unchanged

Same registration since 1989 — no chameleon / reincarnation signal.

Safety

503 inspections · 24 mo · vs national benchmarks

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

Vehicle OOS 11.2%24-mo cumulative

050%nat'l 22.26%

Driver OOS 2.2%24-mo cumulative

030%nat'l 6.67%

Every inspection in the window pooled — 287 vehicle and 503 driver inspections over 24 months.

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

17.1% · latest 6-mo window▲ Rising

Share of vehicle-level roadside inspections in each trailing six-month window that resulted in a vehicle out-of-service order. Trending up 1.7 pts 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

492 inspections in the charted months · busiest month Jan '26 · 28

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.

Thin coverage

Under-inspected

Expected

Well-monitored

Heavily inspected

≈0.3 / unit·yr

thin signalabundant signal

Few roadside inspections for a 834-unit fleet — the out-of-service and violation signals above rest on a small sample, so weight them cautiously. Thin coverage on a young authority is itself a flag.

Registered power units: 834
Inspections · 24 mo: 503
Annualized: ≈252 / yr
Coverage: ≈0.3 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.

392.2 State/local traffic law violation (speeding, etc.)Unsafe Driving135 · 0 OOS
393.9 Inoperative required lampsVehicle Maintenance71 · 4 OOS
396.3 Inspection / repair / maintenance not performedVehicle Maintenance25 · 22 OOS
390.21 USDOT number marking on vehicleUnsafe Driving24 · 0 OOS
393.47 Brake actuators / linings / componentsVehicle Maintenance22 · 3 OOS
392.16 Failure to use seat beltUnsafe Driving22 · 0 OOS
393.95 Emergency equipment (extinguisher, triangles)Vehicle Maintenance16 · 0 OOS
396.17 Periodic (annual) inspectionVehicle Maintenance13 · 0 OOS
393.75 Tires (defective / underinflated / worn)Vehicle Maintenance13 · 10 OOS
393.53 Automatic brake adjusters / indicatorsVehicle Maintenance13 · 0 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 & fleet

VIN-decoded · NHTSA vPIC

Capacity· power units = haulable capacity; trailers are towed

Registered power units (MCS-150): 834
Observed power (24 mo): 305
Trailers (towed): 41

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

Fleet age· model years · decoded VINs

3.4 yr

Average age

2026

Newest model yr

2001

Oldest model yr

18.4%

VINs decoded

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

Operations & lanes

Revealed by inspection density across 21 states · 24 mo

Operating footprint· revealed by roadside-inspection geography

Operating radiusNational

revealed

States observed

US states

Inspections · 24 mo

502

NY busiest

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

Home base

BROCKTON, MA

59 CENTRE ST

Top corridor

NY ⇄ MA

NY 166 · PA 78 · NH 47

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

Last 12 months: 7 trucks also ran under 10 other carriers

VINs inspected under this carrier were recently inspected under other USDOTs too — the active double-broker / shared-equipment signal: USDOT 16130 USDOT 360872 USDOT 1296119 USDOT 4248238 USDOT 3284765 USDOT 3372054 USDOT 1706017 USDOT 3817964Some overlap is legitimate (leased or sold equipment); review alongside the other signals.

Show all-time history (54 trucks · 69 carriers)

Across all inspections on record: USDOT 1461529 USDOT 1559451 USDOT 3537456 USDOT 3834613 USDOT 3853686 USDOT 633854 USDOT 1671658 USDOT 1761848

Capacity consistency· registered vs roadside-observed power units

Registered (MCS-150)

834

Observed (24 mo)

305

Shared w/ other carriers

Registered capacity materially exceeds what is observed roadside — the MCS-150 may be stale or the fleet under-utilized.

Explore the carrier network & VIN cross-links

Identity & contact

FMCSA census + L&I dossier

Location

Physical address: 59 CENTRE ST, BROCKTON, MA, 02301
Mailing address: 647 SUMMER ST, SOUTH BOSTON, MA, 02110
Operation: Interstate· Hazmat

Contact

Phone: (617) 510-7830
Email: john.burns@wbmason.com
Web domain: wbmason.com

Registration

Officer: John Bromage
USDOT / docket: 348981
First registered: Mar 31, 1989
Last MCS-150: Dec 11, 2025 · 24,574,757 mi (2025)
FMCSA safety rating: Conditional · Oct 13, 1993
D-U-N-S: 51807493

Fleet (self-reported · MCS-150)

834

Power units

898

Drivers

161

CDL drivers

24,574,757

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

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Verification summaryAuthority, insurance, safety and identity facts for W B MASON CO INC.

W B MASON CO INC (USDOT 348981) has a Vektor safety score of 88/100 and a Clear to load verdict, from the carrier's FMCSA record refreshed Jun 13, 2026.

The carrier has an unknown current for-hire authority status because no FMCSA L&I authority row is available 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.

Its vehicle out-of-service rate was 11.2% over the last 24 months, versus the 22.26% CVSA national average, from FMCSA roadside-inspection data refreshed Jun 13, 2026.

The carrier received 503 roadside inspections in the last 24 months — 287 vehicle-level and 503 driver-level — across 21 states, according to FMCSA roadside-inspection data refreshed Jun 13, 2026.

The carrier has 14 reportable crashes in the last 24 months and 7 fatal crashes across the full FMCSA crash record available as of Jun 13, 2026.

It reports 834 power units and 898 drivers in its most recent MCS-150 filing dated Dec 11, 2025.

It has an FMCSA safety rating of Conditional assigned Oct 13, 1993 in the federal record refreshed Jun 13, 2026.

Frequently asked

What is W B MASON CO INC's USDOT number?

W B MASON CO INC's USDOT number is 348981.

Is W B MASON CO INC authorized to operate?

As of Jun 13, 2026, W B MASON CO INC is active in the FMCSA register.

What is W B MASON CO INC's safety record?

W B MASON CO INC has a 11.2% vehicle out-of-service rate (national average 22.26%) across 773 roadside inspections, with 14 reportable crashes in the last 24 months, and an FMCSA "Conditional" safety rating. Vektor's computed risk score is 88/100 (tier: clear).