COS LLC
USDOT 2496282 · Active · Doing business as CASTLE OILFIELD SERVICES
Carrier identity
| USDOT Number | 2496282 |
|---|---|
| MC Number | MC-1376430 |
| Legal Name | COS LLC |
| DBA Name | CASTLE OILFIELD SERVICES |
| Entity Type | — |
| Phone | 7015721832 |
| Address | 501 48TH AVE W, Williston, ND, 58801 |
Authority & safety
| Operating Status | Active |
|---|---|
| Operation Type | Interstate |
| Safety Rating | None on record — most carriers have not received a formal FMCSA safety rating. |
| Hazmat Flag | false |
Safety ratings: S = Satisfactory, C = Conditional, U = Unsatisfactory. A carrier with no rating has not been through a full FMCSA compliance review — this is common and not itself a red flag.
Fleet & operations
| Power Units (trucks) | 20 |
|---|---|
| Drivers | 19 |
| Recent Annual Mileage | 345,671 |
| Last MCS-150 Filing | 29-JAN-26 |
COS LLC operates 20 power units — a larger fleet than 97% of carriers registered in ND.
Other carriers in Williston, ND
- BLACK HAWK ENERGY SERVICES LTD — USDOT 2465450, 170 power units
- GO WIRELINE LLC — USDOT 2150288, 143 power units
- OASIS WELL SERVICES LLC — USDOT 2209436, 111 power units
- NOBLE CASING INC — USDOT 2190704, 93 power units
- RED RIVER OILFIELD TRANSPORTATION INC — USDOT 2533139, 93 power units
Browse all carriers in Williston, ND or all ND carriers.