Fleet typeIdentity
Asset-based
834 power units. Brokers price each fleet type apart.
Carrier profile · USDOT 348981
W B MASON CO INC
834 power unitsavg 3.4 yrNational · 21 statesBROCKTON, MA
CARRIER ACTIVERATED CONDITIONALHAZMAT
Observed fleet · trailing 24 mo daily
834Power units
303 observed · MCS-150
39Trailers seen
Decoded · vPIC
3.4Avg age (yr)
2001–2026 · vPIC
Click to see how we scored it
Load decision · FMCSA snapshot · 2026-06-13
Clear to load
Active authority and a clean federal record. No blocking issues found.
Established 37 yearsOut-of-service rates below national averageFatal crash on record
Operating authority3737 yr active
since 1989Insurance (BIPD)Unknown
FMCSA L&IVehicle OOS · 24mo11.111.1 %
▼ 22.26% nat'lCrashes · fatal77
16 in 24moVektor intelligence · beyond the federal recordProprietary signals computed from VIN-decoded inspections & daily FMCSA snapshots
Fleet age vs peersNewer
3.4 yr
Model years 2001–2026 · peer benchmark computing.
Identity stabilityStable
37 yr unchanged
Same registration since 1989 — no chameleon / reincarnation signal.
AI readFull read
Is W B MASON CO INC safe to work with?
Is W B MASON CO INC safe to load? W B MASON CO INC (USDOT 348981) is an active asset-based motor carrier based in BROCKTON, MA, operating 834 power units and 898 drivers. Operating authority has been active 37 years (past the 24-month broker-confidence threshold). Across 764 roadside inspections, its vehicle out-of-service rate is 11.1% (below the 22.26% national average), with 16 reportable crashes in the last 24 months. FMCSA rates it Conditional. Vektor rates it clear to load (88/100), with the leading concern: fatal crash on record. Source: FMCSA SAFER/MCMIS, last updated 2026-06-13.
FMCSA fields + Vektor analysis · updated 2026-06-13
WBW B MASON CO INC 88
01
Safety
764 inspections · 24 mo · vs national benchmarks
Out-of-service rate· trailing 24 months vs national benchmark
Vehicle OOS 11.1% (24-mo)288 veh insp · 24-mo · nat'l 22.26%
050%nat'l 22.26%
Driver OOS 2.4% (24-mo)501 drv insp · 24-mo · nat'l 6.67%
030%nat'l 6.67%
OOS trajectory· trailing 6-mo vehicle-OOS rate vs national
11.6% now● Stable
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.
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
- 501
- Annualized
- ≈251 / 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
- 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
- 393.47 Brake actuators / linings / componentsVehicle Maintenance22 · 3 OOS
- 392.16 Failure to use seat beltUnsafe Driving22
- 393.95 Emergency equipment (extinguisher, triangles)Vehicle Maintenance16
- 396.17 Periodic (annual) inspectionVehicle Maintenance13
- 393.75 Tires (defective / underinflated / worn)Vehicle Maintenance13 · 10 OOS
- 393.53 Automatic brake adjusters / indicatorsVehicle Maintenance13
02
Authority & insurance
Can they legally + adequately haul your load?
Insurance continuity· insurer · policy · lapses
No insurance filing history on record.
03
Equipment & fleet
VIN-decoded · NHTSA vPIC
Capacity· power units = haulable capacity; trailers are towed
- Registered power units (MCS-150)
- 834
- Observed power (24 mo)
- 303
- Trailers (towed)
- 39
Capacity is power units only — trailers are towed equipment and are never summed into a fleet-size figure.
Fleet age· model years · decoded VINs
Average age
2026
Newest model yr
2001
Oldest model yr
VINs decoded
04
Operations & lanes
Revealed by inspection density across 21 states · 24 mo
Operating footprint· revealed by roadside-inspection geography
Operating radiusNational
revealedStates observed2020
US statesInspections · 24 mo500500
NY busiestInspection density by state· each tile = a state · shade = inspections, last 24 mo
Home base
BROCKTON, MA
Top corridor
NY ⇄ MA
Density
fewermore
05
Network & fraud
Affiliated entities & reincarnation signals · for review, not a verdict
Last 12 months: 8 trucks also ran under 11 other carriers
VINs inspected under this carrier were recently inspected under other USDOTs too — the active double-broker / shared-equipment signal: USDOT 16130USDOT 360872USDOT 1296119USDOT 4248238USDOT 3284765USDOT 3372054USDOT 1706017USDOT 3817964Some overlap is legitimate (leased or sold equipment); review alongside the other signals.
Show all-time history (49 trucks · 62 carriers)
Across all inspections on record: USDOT 1461529USDOT 1559451USDOT 3537456USDOT 3834613USDOT 3853686USDOT 57650USDOT 329628USDOT 3007828
Capacity consistency· registered vs roadside-observed power units
Registered (MCS-150)834834
Observed (24 mo)303303
Shared w/ other carriers4949
Registered capacity materially exceeds what is observed roadside — the MCS-150 may be stale or the fleet under-utilized.
06
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
- Web domain
- wbmason.com
Registration
- Officer
- John Bromage
- USDOT / docket
- 348981
- First registered
- 03/31/1989
- Last MCS-150
- 12/11/2025 · 24,574,757 mi (2025)
- FMCSA safety rating
- Conditional · 10/13/1993
- D-U-N-S
- 51807493
Fleet (self-reported · MCS-150)
07
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.
08
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 W B MASON CO INC. Reviews cover performance only — on-time delivery, payment speed, communication — and never affect the Vektor risk score.
Leave a review09
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 2026-06-13, 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 11.1% vehicle out-of-service rate (national average 22.26%) across 764 roadside inspections, with 16 reportable crashes in the last 24 months, and an FMCSA "Conditional" safety rating. Vektor's computed risk score is 88/100 (tier: clear).
How big is W B MASON CO INC's fleet?
W B MASON CO INC operates 834 power units and 898 drivers per its most recent MCS-150 filing.
Where is W B MASON CO INC based?
W B MASON CO INC is based in BROCKTON, MA, with roadside inspections recorded across 21 states.