Carrier profile · USDOT 2496282 · MC-1376430 · Updated Sep 6, 2026
Cos LLC
DBA CASTLE OILFIELD SERVICES
20 power unitsavg 13 yrLocal · 2 statesWILLISTON, ND74/100
CARRIER ACTIVEMC-1376430 ACTIVERATED SATISFACTORY
Equipment
Haulable capacity (power units only — trailers are towed context), equipment mix, and the VIN-decoded unit roster. Click any VIN to trace that unit across every carrier that has run it.
Capacity· power units = haulable capacity; trailers are towed
- Registered power units (MCS-150)
- 20
- Observed power (24 mo)
- 5
- Trailers (towed)
- 2
Capacity is power units only — trailers are towed equipment and are never summed into a fleet-size figure.
Fleet age· model years · decoded VINs
Average age
2023
Newest model yr
2004
Oldest model yr
28.6%
VINs decoded
Unit roster· VIN-decoded from inspections · NHTSA vPIC
| VIN | Type | Year | Make | Model | Insp. | Last seen |
|---|---|---|---|---|---|---|
| 1NKWL4EX1EJ409039View sourced platform decode | Truck | 2014 | KENWORTH | W9 Series | 3 | Apr 18, 2026 |
| 1XKDDB9X04R062991View sourced platform decode | Power unit | 2004 | KENWORTH | — | 1 | Feb 24, 2025 |
| 3GTUUBE8XPG272223View sourced platform decode | Power unit | 2023 | GMC | — | 1 | Feb 1, 2025 |
| 56JTE1624DA131542View sourced platform decode | Trailer | 2013 | UNIT | — | 1 | Feb 1, 2025 |
| 5721DEC0 | Power unit | — | IDEC | — | 1 | Feb 1, 2025 |
| SNTR114644MT | Trailer | 2004 | TRLR | — | 1 | Feb 1, 2025 |
| 3C6UR5NL2JG315684View sourced platform decode | Pickup | 2018 | RAM | 2500 | 1 | Feb 1, 2025 |
| 3ALACWDT6FDGB2497View sourced platform decode | Power unit | 2015 | FREIGHTLIN | — | 1 | Jan 10, 2025 |
Showing 8 · most-inspected first.