William N Mason Inc

USDOT 227340MC-407667USDOT activeAuthority active· Baltimore, MD

William N Mason Inc (USDOT 227340) holds active operating authority as a motor carrier of property under MC-407667 based in Baltimore, MD. The earliest grant on file is from July 2001, 25 years, 4 months ago. $750,000 of liability coverage is on file with Sentry Select Insurance Company. It reported 15 power units and 11 drivers on its last MCS-150 update (May 2026).

Operating authority

Docket	Authority	Status	Insurance required	On file
MC-407667	Motor carrier of property	Active	$750,000 liability	$750,000 liability

Earliest grant on file: Jul 2, 2001 (25 years, 4 months ago).

Insurance and bonds on file

Type	Insurer	Coverage	Effective	Cancellation
Liability (BIPD) · form 91X	Sentry Select Insurance Company	$750,000	Mar 1, 2023	—

Confirm coverage with the insurer before tendering a load.

Authority history

Date	Docket	Action
Jun 3, 2019	MC-407667	Reinstated · motor carrier of property
May 28, 2019	MC-407667	Revoked · motor carrier of property
Mar 4, 2019	MC-407667	Discontinued revocation · contract carrier
Feb 22, 2019	MC-407667	Involuntary revocation · contract carrier
Mar 6, 2009	MC-407667	Discontinued revocation · contract carrier
Feb 9, 2009	MC-407667	Involuntary revocation · contract carrier
Jun 26, 2008	MC-407667	Discontinued revocation · contract carrier
Jun 23, 2008	MC-407667	Involuntary revocation · contract carrier
Mar 7, 2008	MC-407667	Discontinued revocation · contract carrier
Feb 11, 2008	MC-407667	Involuntary revocation · contract carrier
Mar 9, 2007	MC-407667	Discontinued revocation · contract carrier
Feb 9, 2007	MC-407667	Involuntary revocation · contract carrier
Mar 8, 2006	MC-407667	Discontinued revocation · contract carrier
Feb 9, 2006	MC-407667	Involuntary revocation · contract carrier
Mar 11, 2005	MC-407667	Discontinued revocation · contract carrier
Feb 9, 2005	MC-407667	Involuntary revocation · contract carrier
Jun 28, 2004	MC-407667	Discontinued revocation · contract carrier
Jun 4, 2004	MC-407667	Involuntary revocation · contract carrier
Mar 10, 2004	MC-407667	Discontinued revocation · contract carrier
Feb 27, 2004	MC-407667	Involuntary revocation · contract carrier
Jul 2, 2001	MC-407667	Granted · motor carrier of property

Revocations

Docket	Authority	Order served	Effective
MC-407667	Contract	Apr 25, 2019	May 28, 2019 · involuntary revocation

Registration

USDOT number	227340
USDOT status	Active
MC number	MC-407667
Legal name	William N Mason Inc
Operation	Interstate
Classification	Authorized for hire
Business type	Corporation
Location	Baltimore, Maryland 21229
USDOT added	Jan 19, 1983
Last MCS-150 update	May 6, 2026
Safety rating	Satisfactory · Nov 2, 2002
Hazardous materials	Yes

Fleet

Power units	15
Trucks	15
Drivers	11 · 11 with a CDL
Annual miles	278,770 · 2024

Cargo carried

General freight, Motor vehicles, Building materials, Machinery, large objects, Construction

Check it yourself

Data as of Nov 14, 2026. Sources

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