Data / Carriers / Maryland / William N Mason Inc
William N Mason Inc, Baltimore, MD: USDOT 227340, 15 power units, 21 inspections, 1 crash
William N Mason Inc (USDOT 227340) is an interstate carrier in Baltimore, MD, registered with FMCSA with 15 power units and 11 drivers as it reports them. FMCSA recorded 21 roadside inspections from November 7, 2024 to November 7, 2026, the latest on October 28, 2026. Its vehicle out of service rate was 33.3% against 22.9% for all carriers (5 of 15 vehicle inspections). The states reported 1 crash in the same period.
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- USDOT number
- 227340
- Location
- 3510 Wilkens Ave, Baltimore, MD 21229
- Phone
- (410) 525 2288
- Operation
- Interstate; for hire
- Docket
- MC 407667
- Operating authority
- Active contract carrier authority for property
- Liability insurance on file
- $750,000 (bodily injury and property damage)
- Power units
- 15
- Drivers
- 11 (11 with a commercial licence)
- Miles reported
- 278,770 in 2024
- Cargo carried
- General freight, Motor vehicles, Building materials, Machinery and large objects
- Hazardous materials
- Yes, as the carrier reports
- Compliance review rating
- Satisfactory (November 2, 2002)
- Last registration update
- May 6, 2026
- In the FMCSA register since
- January 19, 1983
- FMCSA safety measurement page
- ai.fmcsa.dot.gov
Inspections and out of service rates
Roadside inspections from November 7, 2024 to November 7, 2026. The national rate is the rate across every carrier in the same window.
| Measure | Inspections | Out of service | Rate | National rate | Against national |
|---|---|---|---|---|---|
| Vehicle inspections | 15 | 5 | 33.3% | 22.9% | 10.4 points above the national rate |
| Driver inspections | 21 | 1 | 4.8% | 6.3% | 1.5 points below the national rate |
| All inspections, any out of service order | 21 | 5 | 23.8% | 19.4% |
Crashes
1 crash reported from November 7, 2024 to November 7, 2026.
| Date | City | State | Deaths | Injuries | Towed away |
|---|---|---|---|---|---|
| October 23, 2025 | New Kent | VA | 0 | 0 | Yes |
The carrier's full record on the FMCSA safety measurement page
Also on SpecStream
- Carriers in Maryland
- Carriers in Baltimore, MD
- General freight carriers in Maryland
- Motor vehicles carriers in Maryland
- Building materials carriers in Maryland
Updated November 7, 2026. Read from US Department of Transportation, FMCSA Motor Carrier Census, Inspection, Crash and Licensing files. Public domain (U.S. government work). Inspection and crash counts cover November 7, 2024 to November 7, 2026. Fleet size, drivers, cargo and operation are as each carrier reports them to FMCSA and can be out of date. A vehicle or driver out of service order means an inspector ordered the vehicle or driver off the road until the problem was fixed. The national rate comes from every inspection in the same window. Crashes are those state police reported to FMCSA and are not a finding of fault. This page uses US Department of Transportation data and is not endorsed or certified by the Department of Transportation or FMCSA. Free to reuse with credit to SpecStream under CC BY 4.0. Spot a wrong value? Write to [email protected] with the link to this page.