Preview 920,160 motor carriers — every carrier FMCSA lists as active with at least one power unit, plus carriers whose registration went inactive within the last three years (inferred from MCS-150 filing dates). The full load is in progress, so this is how far it has got. Sourced from the FMCSA Motor Carrier Census. Data as of 2026-09-22.

COS LLC

Doing business as CASTLE OILFIELD SERVICES

USDOT 2496282
MC docket MC-1376430
USDOT registration Active

Operating authority — FMCSA publishes no current status for this carrier. See FMCSA’s record.

Safety rating Satisfactory rated 2026-04-03; last reviewed 2026-02-20
Hazardous materials No
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Insurance and operating authority

Required and on-file BI&PD liability amounts, cargo and surety bond filings, and the operating authorities this carrier holds.

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No roadside inspections or annual mileage on file, which is not enough data to compare with other carriers. That is normal for a small or recently registered carrier.

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Carrier details
Fleet and drivers
Power units
20
Trucks
20
Buses
0
Drivers
19
Drivers holding a CDL
14
What they run
Cargo authorised to carry
Operating range
Interstate, within 100 miles
Carrier operation
Interstate
Operation classification
AUTHORIZED FOR HIRE
Annual mileage reported
251,164
Mileage year
2025
Safety history
Safety rating date
2026-04-03
Last compliance review
2026-02-20
Review type
C compliance review
Registration
First on file
2014-04-16
Carrier last updated its record
2026-01-29
City
WILLISTON
State
ND
ZIP
58801

More carriers in Williston, ND

Data as of 2026-09-22 · The official FMCSA record · About this data