Carrier profile · USDOT 991591 · Updated Jun 13, 2026
WILLIAM A DIETZ
DBA DIETZ BROTHERS
3 power unitsGLEN ARM, MD50/100
AUTHORITY STATUS UNKNOWN
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
- 5728 GLEN ARM RD, GLEN ARM, MD, 21057-0259
- Mailing address
- P O BOX 259, GLEN ARM, MD, 21057-0259
- Operation
- Interstate
Contact
- Phone
- (410) 592-5347
- Cell
- (410) 977-2904
- Fax
- (410) 592-5541
- wdietz7410@aol.com
Registration
- Officer
- William Dietz
- USDOT / docket
- 991591
- First registered
- Dec 3, 2001
- Last MCS-150
- Jan 28, 2007 · 2,702 mi (2002)
- FMCSA safety rating
- Not rated
- D-U-N-S
- —
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.