Cos Llc
DBA: Castle Oilfield Services
USDOT 2496282 · MC-1376430 · Williston, North Dakota 58801
20
Power units
19
Drivers
Interstate
Operation
Satisfactory
Safety rating
Registration details
- Entity type
- —
- First registered
- 2014-04-16
- Last MCS-150 update
- 2026-01-29
- Phone
- (701) 572-1832
Is this your company? Profile claiming with a verified badge and equipment photos is coming soon. Data reflects the FMCSA Company Census and may lag official records — verify current authority and insurance at safer.fmcsa.dot.gov.