Carrier profile · USDOT 227340 · MC-407667 · Updated Jun 13, 2026
WILLIAM N MASON INC
15 power unitsavg 16.9 yrRegional · 6 statesBALTIMORE, MD87/100
CARRIER ACTIVEMC-407667 ACTIVERATED SATISFACTORYHAZMAT
Identity & Federal
The official FMCSA identity — legal name, DBA, addresses, contact, officers, and registration — alongside the daily-captured federal-record activity feed, monitored daily by Vektor.
Location
- Physical address
- 3510 WILKENS AVE, BALTIMORE, MD, 21229
- Operation
- Interstate· Hazmat
Contact
- Phone
- (410) 525-2288
- Fax
- (410) 646-5737
- bill@masoninc.com
- Web domain
- masoninc.com
Registration
- Officer
- William N. Mason
- USDOT / docket
- 227340 · MC-407667
- First registered
- Jan 19, 1983
- Last MCS-150
- May 6, 2026 · 278,770 mi (2024)
- FMCSA safety rating
- Satisfactory · Nov 2, 2002
- D-U-N-S
- 64874597
Fleet (self-reported · MCS-150)
MCS-150 filing history· biennial-update cadence
Per-filing MCS-150 history (each biennial update + the fleet/mileage it reported) is being captured from the daily federal feed and will appear here as we capture the full history.
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.