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COWBOY OILFIELD SERVICES LLC
Stephenville, TX
CarrierChk vetting signal
Review recommended
Elevated Out-of-Service Rate
57.1% of this carrier's roadside inspections in the last 24 months put a driver or vehicle out of service — higher than 87% of carriers with a comparable number of inspections. This is a CarrierChk calculation from FMCSA inspection records, not an FMCSA rating.
See details ↓
FMCSA status: Active registration · no operating authority · DOT 4156836
Active
No Safety Rating
Broker Vetting Summary
Key signals from current FMCSA records
Authority
No Active Authority
Common carrier
Insurance
Not Found
No coverage amount on file
Safety
Not Rated
57.1% OOS · 8 inspections on record
Flags · 1
Elevated Out-of-Service Rate
57.1% of this carrier's roadside inspections in the last 24 months put a driver or vehicle out of service — higher than 87% of carriers with a comparable number of inspections. This is a CarrierChk calculation from FMCSA inspection records, not an FMCSA rating.
Vetting notes
- Active FMCSA registration, but no active for-hire operating authority on record
- Registered with FMCSA as a private carrier — not registered to haul other companies' freight for hire
- No active insurance filing found on record
- Vehicle out-of-service rate 66.7% — above the 20.7% national average
- 8 FMCSA inspections on record
Company Information
Registration, contact and cargo details
FMCSA Registration
DOT Number
4156836
Safety Rating
Not Rated
Operation Classification
Private (property)
MCS-150 Filed
October 24, 2024
FMCSA Registration
November 14, 2023
Annual Mileage
1 mi (2023)
Contact Information
Address
1290 Oak Hill Trl, Stephenville, TX 76401-8220
Phone
Owner / Officer
Britt Smith
Cargo Types
General FreightOilfield EquipmentOther Cargo
Safety Snapshot
Out-of-service rates, violations and crashes
Safety & Inspection Summary
Total Inspections
8
Driver Inspections
4
Vehicle Inspections
6
Out-of-Service Violations
9
Violations by Category
Vehicle Maintenance45
Unsafe Driving1
Hours of Service1
OOS Rates vs. National Average
Driver OOS Rate0.0% · national avg 5.5%
✓ Below national average
Vehicle OOS Rate66.7% · national avg 20.7%
⚠ Above national average (46.0pp higher)
57.1% of 7 inspections in the last 24 months put a driver or vehicle out of service —
87th percentile among carriers with 5–9 inspections (lower is better).
CarrierChk calculation from FMCSA roadside inspection records, not an FMCSA score.
Inspection Trend by Year
2026
2025
2024
Violation Rate by Category
Share of roadside inspections in FMCSA's rolling 24-month window that found a violation in each category. The individual violations are listed under each inspection in Inspection Details below. None of this is the basis of the safety rating, which comes from an on-site compliance review.
Vehicle Maintenance
6 of 6 inspections
Unsafe Driving
1 of 7 inspections
Hours of Service
0 of 7 inspections
Driver Fitness
0 of 7 inspections
Controlled Substances
0 of 7 inspections
Crash History (1)
Crashes reported to FMCSA in the last 24 months. A crash appearing here is a reported event, not a finding of fault.
1
Crashes
0
Fatalities
0
Injuries
1
Tow-aways
| Date | State | Fatal | Injured | Tow | Conditions |
|---|---|---|---|---|---|
| May 16, 2026 | TX | — | — | Yes | No Adverse Conditions · Dark - Lighted · Dry |
Fleet & Operating Areas
Observed roadside activity and equipment
Where This Carrier Operates
States where this carrier's roadside inspections were recorded
FewerMore
TX6
NM1
Fleet & Equipment (6)
Vehicles identified in this carrier's inspection history. Year, make, model and equipment type are decoded from the VIN.
Power units
~3
of 8 reported to FMCSA
Trailers
~3
seen at inspection
Equipment types observed
Tractor
3
Equipment Trailer
1
Flatbed
1
Semi-trailer
1
Units on record
| Vehicle | Type | VIN | Inspections | With OOS |
|---|---|---|---|---|
| 2015 Mack GU (Granite) | Tractor · Class 8 | 1M1AX09Y2FM022589 | 3 | 2 |
| 2013 Kenworth T8 Series | Tractor · Class 8 | 1XKDD49X5DJ357787 | 3 | 2 |
| 2015 Transcraft/wabash Steel Flatbed | Flatbed · 53 ft | 1TTE533S4F3888625 | 2 | 1 |
| Lufk | Semi-trailer | 1L01B512221150301 | 1 | 1 |
| 2013 Kenworth T8 Series | Tractor · Class 8 | 1XKDDP9X1DJ368612 | 1 | — |
| 2007 Kalyn Siebert | Equipment Trailer · 35 ft | 5DDKE354071002807 | 1 | — |
A vehicle appearing here was recorded in an inspection — it is not proof the carrier still operates it today.
Inspection Details
Each roadside inspection with its violations
Inspection Records (8)
| Date | Report # | Location | Level | Viol | OOS | Shipper | Unit Type | Make | VIN | License |
|---|---|---|---|---|---|---|---|---|---|---|
| May 7, 2026 | 4775Q3JM0V | SR 176, NM | III | 2 | — | SELF | Truck Tractor Semi-trailer |
MACK TRANSCRAFT/WABASH |
1M1AX09Y2FM022589 1TTE533S4F3888625 |
TX R801702 TX 281B173 |
| 392.16 | Failing to use seat belt while operating a CMV | Seat Belt | ||||||||
| 392.2 | Violation of Local Laws - Explain | |||||||||
| May 2, 2026 | V262345121 | 728M US67, TX | II | 11 | 2 | COWBOY OILFIELD SERVICES LLC | Truck Tractor Semi-trailer |
MACK LUFK |
1M1AX09Y2FM022589 1L01B512221150301 |
TX R801702 TX 193702N |
| 393.75A3 | OOSTire-flat and/or audible air leak | Tires | ||||||||
| 393.9 | OOSInoperable Required Lamp | Clearance Identification Lamps/Other | ||||||||
| 393.203C | Hood not securely fastened | Cab Body Frame | ||||||||
| 393.78 | Wipers - Inoperative / missing / damaged wipers | Windshield/ Glass/ Markings | ||||||||
| 393.78 | Wipers - Inoperative / missing / damaged wipers | Windshield/ Glass/ Markings | ||||||||
| 393.81 | Horn inoperative | Other Vehicle Defect | ||||||||
| 393.9H | Inoperable head lamps | Lighting | ||||||||
| 393.9 | Inoperable Required Lamp | Clearance Identification Lamps/Other | ||||||||
| 393.9 | Inoperable Required Lamp | Clearance Identification Lamps/Other | ||||||||
| 393.9T | Inoperable tail lamp | Lighting | ||||||||
| 393.9TS | Inoperative turn signal | Lighting | ||||||||
| March 18, 2026 | V262176246 | ANDREWS LOOP 1910 AT, TX | II | 12 | — | COWBOY | Truck Tractor Semi-trailer |
KENWORTH KALYN SIEBERT |
1XKDDP9X1DJ368612 5DDKE354071002807 |
TX R836043 TX 211C651 |
| 390.21A | Not marked in accordance with regulations | |||||||||
| 393.11TL | Truck-Tractor lower rear mud flaps retroreflective sheeting / reflex reflective material requirements for vehicles manufactured after July 1997 | Reflective Sheeting | ||||||||
| 393.11TU | Truck-Tractor upper body corner requirements for retroreflective sheeting or reflex reflective material for vehicles manufactured after July 1997 | Reflective Sheeting | ||||||||
| 393.75C | Tire-other tread depth less than 2/32 of inch measured in a major tread groove | Tires | ||||||||
| 393.9 | Inoperable Required Lamp | Clearance Identification Lamps/Other | ||||||||
| 393.9 | Inoperable Required Lamp | Clearance Identification Lamps/Other | ||||||||
| 393.9 | Inoperable Required Lamp | Clearance Identification Lamps/Other | ||||||||
| 393.9 | Inoperable Required Lamp | Clearance Identification Lamps/Other | ||||||||
| 393.9 | Inoperable Required Lamp | Clearance Identification Lamps/Other | ||||||||
| 393.95F | Emergency Equipment - Stopped vehicle warning devices missing or improper | Emergency Equipment | ||||||||
| 396.17C | Operating a CMV without proof of a periodic inspection | Inspection Reports | ||||||||
| 392.2RG | State vehicle registration or License Plate violation | |||||||||
| January 2, 2026 | V262160244 | 287M FM1787, TX | II | 5 | — | COWBOY OILFIELD SERVICES LLC | Truck Tractor |
KENWORTH |
1XKDD49X5DJ357787 |
TX R801700 |
| 393.47E | Brake Out of Adjustment - Roto, Clamp (Short & Long), DD-3, or Bolt | Brakes Out of Adjustment | ||||||||
| 393.53B | CMV manufactured after 10/19/94 has an automatic airbrake adjustment system that fails to compensate for wear | Brakes All Others | ||||||||
| 393.55C1 | Truck Tractor manufactured on or after March 1, 1997 not equipped with an antilock brake system | Brakes All Others | ||||||||
| 393.78 | Wipers - Inoperative / missing / damaged wipers | Windshield/ Glass/ Markings | ||||||||
| 393.9 | Inoperable Required Lamp | Clearance Identification Lamps/Other | ||||||||
| December 17, 2025 | V252154511 | N FM33 N FM33, TX | I | 5 | 3 | FIELD | Truck Tractor |
KENWORTH |
1XKDD49X5DJ357787 |
TX R801700 |
| 393.207A | OOSAxle positioning parts defective/missing | Suspension | ||||||||
| 393.43A | OOSNo/improper tractor protection valve | Brakes All Others | ||||||||
| 393.45 | OOSBrake tubing and hose adequacy | Brakes All Others | ||||||||
| 393.203C | Hood not securely fastened | Cab Body Frame | ||||||||
| 393.45DLUV | Brake Connections with Leaks Under Vehicle | Brakes All Others | ||||||||
| December 1, 2025 | V252101543 | 1706 LOOP 1910, TX | II | 10 | 2 | COWBOY | Truck Tractor Semi-trailer |
MACK TRANSCRAFT/WABASH |
1M1AX09Y2FM022589 1TTE533S4F3888625 |
TX R801702 TX NONE |
| 393.75A3-ATIS | OOSTires - All others, leaking in tread area with inflation more than 50% of the maximum inflation pressure on tire equipped with ATIS | Tires | ||||||||
| 393.9TS | OOSInoperative turn signal | Lighting | ||||||||
| 390.21A | Not marked in accordance with regulations | |||||||||
| 393.78 | Wipers - Inoperative / missing / damaged wipers | Windshield/ Glass/ Markings | ||||||||
| 393.9 | Inoperable Required Lamp | Clearance Identification Lamps/Other | ||||||||
| 393.9 | Inoperable Required Lamp | Clearance Identification Lamps/Other | ||||||||
| 393.9 | Inoperable Required Lamp | Clearance Identification Lamps/Other | ||||||||
| 393.95F | Emergency Equipment - Stopped vehicle warning devices missing or improper | Emergency Equipment | ||||||||
| 396.17C | Operating a CMV without proof of a periodic inspection | Inspection Reports | ||||||||
| 392.2RG | State vehicle registration or License Plate violation | |||||||||
| October 29, 2025 | 7A189DMBQL | SH-0349 IN MARTIN CO. (290-322, TX | I | 4 | 1 | DIAMONDBACK | Truck Tractor |
KENWORTH |
1XKDD49X5DJ357787 |
TX R807100 |
| 396.3A1BL | OOSBrake system pressure loss | Brakes All Others | ||||||||
| 393.78 | Wipers - Inoperative / missing / damaged wipers | Windshield/ Glass/ Markings | ||||||||
| 393.9 | Inoperable Required Lamp | Clearance Identification Lamps/Other | ||||||||
| 393.45DLUV | Brake Connections with Leaks Under Vehicle | Brakes All Others | ||||||||
| January 17, 2024 | V241271272 | 3140 US281 NB, TX | III | 4 | 1 | COWBOY OILFIELD | Straight Truck Semi-trailer |
FORD BIGT |
1FT8W3DT2LEE25962 16VGX3220K6078552 |
TX TTF1913 TX 310105K |
| 395.8F01 | OOSDrivers record of duty status not current | Incomplete/Wrong Log | ||||||||
| 390.21A | Not marked in accordance with regulations | |||||||||
| 396.17C | Operating a CMV without proof of a periodic inspection | Inspection Reports | ||||||||
| 396.17C | Operating a CMV without proof of a periodic inspection | Inspection Reports | ||||||||
Shippers Seen at Inspections
Shipper names recorded by roadside inspectors over roughly the last three years. Only inspected loads appear, so this is a sample of who the carrier hauls for, not a complete customer list. Names are as entered at the roadside; blanks and placeholders such as “N/A” or “same as carrier” are left out.
| Shipper | Inspections | Most recent |
|---|---|---|
| DIAMONDBACK | 1 | October 29, 2025 |
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Data sourced from FMCSA MCMIS via Socrata. Record last updated: September 13, 2026.
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