WN
WILLIAM N MASON INC
DOT 227340MC 407667ActiveMotor CarrierInterstateSENTRY SELECT INSURANCE COMPANY · $750,000 · 1 policyBALTIMORE, MD
COMPANY
Authority since
2019-03-04
MCS-150
2026-05-06 · 278,770 mi (2024)
Fleet
15 units · 77 trailers · 11 drivers
ADDRESS
Physical
3510 WILKENS AVE
BALTIMORE, MD 21229
BALTIMORE, MD 21229
Mailing
Same as physical
CONTACT
Phone
4105252288
Email
BILL@MASONINC.COM
OFFICERS
Primary Officer
WILLIAM N. MASON
Title
PRESIDENT
OPERATION & CARGO
Operation classification
Authorized For Hire
Specialty
Auto Transport
Cargo types
5
General FreightMotor VehiclesBuilding MaterialsMachinery, Large ObjectsConstruction
Self-reported by the company on its latest MCS-150 filing (FMCSA census). Reflects what the carrier is authorized and equipped to haul, not actual recent loads.
AUTHORITY
91 mo
Active authority
INSURANCE
1 active
SENTRY SELECT INSURANCE COMPANY
RISK GRADE
Moderate Risk
3 risk factors · 1 strengths
OOS RATE
25.9%
7 / 27 inspections
Fleet vs Reality
last 12 months · power-unit VINs from roadside inspections Checking local VIN index…
Moderate Risk
28/100 risk points3 risk factors · 1 strengths · 4 data pointshigh confidenceWeighted heuristic: crashes are decayed by recency and normalized per 100 power units, out-of-service and violation rates use a rolling 24-month window, plus FMCSA BASIC alerts and the CarrierIntel Safety Score (which also decays when compliance has not been verified by a recent inspection). Not the official FMCSA SMS score.
SAFETY PERFORMANCE
Crash Record
29 crashes · 0 fatal · 9 with injuries · 28 tow-away
Clean Inspection Rate
74% — 20 clean of 27 inspections
Out-of-Service Rate
25.9% — driver OOS 1, vehicle OOS 7
COMPLIANCE & AUTHORITY
Operating Authority
Active operating authority on file
Authority Events
21 historical event(s) on file
MCS-150 Filing
Last filed 2026-05-06
INSURANCE
Active Coverage
1 active policy(ies) · total max coverage $750,000
SUMMARY
Elevated OOS rate 19% (last 24 mo)
6.7 crashes per 100 trucks/yr
2.6 violations per inspection
Active insurance on file
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