TruckCodex

STX UNDERGROUND LLC

USDOT 3606119 • 1511 LOS SABALES DR, BROWNSVILLE, TX, 78520

ACTIVE
Authority:None on file
Insurance:None on file
BOC-3:Not on file
Safety Rating:Not rated
MCS-150:Never updated
OOS Orders:1 active

Overview

Company profile from FMCSA Census File

USDOT
3,606,119
Status
ACTIVE
Operation
Intrastate (Non-Hazmat)
State
Texas
Phone
9565727466
Email
[email protected]
Power Units (MCS-150)
2
Drivers (MCS-150)
2
MCS-150 Mileage
202
Physical Address
1511 LOS SABALES DR, BROWNSVILLE, TX, 78520
Contact
Phone: 9565727466

Risk Signals3 flagged

HIGH
1 active Out-of-Service order
Active OOS orders prevent this carrier from operating until rescinded. See the OOS Orders table for details.
MEDIUM
Elevated vehicle OOS rate: 66.7%
National average is 23.4%. This carrier's vehicle OOS rate is 43.3 percentage points above average.
MEDIUM
Elevated driver OOS rate: 38.1%
National average is 6.7%. This carrier's driver OOS rate is 31.4 percentage points above average.

Signals are auto-detected from FMCSA public records. This is not a regulatory determination.

Authority & Insurance

Operating authority, insurance filings, and BOC-3 status

Active Authority
0
Revoked / Inactive
0
Authority Types
0
Insurance Policies
None on file
BOC-3 Filing
Not on file

Operating Authority

fmcsa-authhistApr 5, 2026
No records found

No insurance filings found for this carrier in FMCSA records.

Check FMCSA SAFER for current insurance status

Out-of-Service Orders (1)

fmcsa-oos-orders
Out-of-Service Orders (1)
OOS DateReasonStatusRescinded
Dec 31, 2022Intrastate Out of ServiceACTIVEApr 30, 2025

Safety & Inspections

SMS BASIC scores, inspection history, and out-of-service rates

SMS BASIC Scores

Driver Fitness
4%
ALERT
Drugs / Alcohol
0%
ALERT
Hours of Service
0%
Vehicle Maintenance
12%

Higher percentile = worse safety performance relative to peers. Scores at or above 75% trigger FMCSA alerts.

Inspections
21
Violations
202
42 OOS
Vehicle OOS %
66.7%
Above nat'l avg (23.4%)
Driver OOS %
38.1%
Above nat'l avg (6.7%)
Power Units (MCS-150)
2
Drivers (MCS-150)
2
Crash Records
0

Inspection Activity (24 months)

Monthly inspection counts with OOS months highlighted. Hover bars for details.

1
May
Jun
1
Jul
3
Aug
1
Sep
1
Oct
Nov
1
Dec
1
Jan
Feb
1
Mar
1
Apr
1
May
Jun
Jul
1
Aug
Sep
1
Oct
Nov
1
Dec
Jan
1
Feb
Mar
Apr
Clean monthMonth with OOSBased on latest 21 of 21 inspection records

Inspection Activity Map

1 state • 21 inspections

🚛
None Low Medium High🚛 Home base

Violation Summary (202 violations from 21 inspections)

fmcsa-inspection-file
Violation Summary (202 violations from 21 inspections)
CodeDescription# Violations# OOSSeverity WtBASIC
FMCSR:392.2RGOperating a CMV while ill or fatigued1708Unsafe Driving
FMCSR:390.21(a)Vehicle marking requirements1603General/Admin
FMCSR:392.2Operating a CMV while ill or fatigued1508Unsafe Driving
FMCSR:393.9(a)Inoperable required lamps1303Vehicle Maintenance
FMCSR:396.17(c)No proof of periodic inspection1303Vehicle Maintenance
FMCSR:393.9Inoperable Required Lamp120—Vehicle Maintenance
FMCSR:396.17CNo proof of periodic inspection1103Vehicle Maintenance
FMCSR:393.95(a)Emergency equipment - fire extinguisher missing/defective905Vehicle Maintenance
FMCSR:393.95(f)Emergency Equipment - Stopped vehicle warning devices missing or improper70—Vehicle Maintenance
FMCSR:393.43DBrake - relay emergency valve637Vehicle Maintenance
FMCSR:393.78Windshield condition defective504Vehicle Maintenance
FMCSR:393.95AEmergency equipment - fire extinguisher missing/defective505Vehicle Maintenance
FMCSR:393.11Lighting devices/reflectors503Vehicle Maintenance
FMCSR:383.23A2Operating a CMV without a CDL44—Driver Fitness
FMCSR:393.95FEmergency Equipment - Stopped vehicle warning devices missing or improper40—Vehicle Maintenance
FMCSR:393.43(d)Brake - relay emergency valve447Vehicle Maintenance
FMCSR:383.23(a)(2)CDL - wrong class448Driver Fitness
FMCSR:393.48AInoperative/defective brakes308Vehicle Maintenance
FMCSR:396.3A1BOSBRAKES OUT OF SERVICE: The number of defective brakes is equal to or greater than 20 percent of the service brakes on the vehicle or combination33—Vehicle Maintenance
FMCSR:393.100(a)Cargo securement - general failure337Vehicle Maintenance
FMCSR:396.3(a)(1)Inspection/repair/maintenance - general335Vehicle Maintenance
FMCSR:391.41(a)Physical qualification - general307Driver Fitness
FMCSR:391.41APCMedical (Certificate) - Operating a property-carrying vehicle without a valid medical certificate in possession or on file with the state drivers licensing agency22—Driver Fitness
FMCSR:392.9BA-INACTIVE392.9BA-INACTIVE21—Unsafe Driving
FMCSR:393.9TInoperable tail lamp20—Vehicle Maintenance
FMCSR:393.9TSInoperative turn signal22—Vehicle Maintenance
FMCSR:393.75CTire tread depth insufficient (other axles)205Vehicle Maintenance
FMCSR:393.75(g)393.75(g)21—Vehicle Maintenance
FMCSR:393.130Cargo securement - heavy equipment227Vehicle Maintenance
FMCSR:393.104(f)(3)Cargo securement - tiedown damaged206Vehicle Maintenance
FMCSR:393.23PTAll required lamps on towed vehicle inoperative due to no electrical connection11—Vehicle Maintenance
FMCSR:396.3A1E-PNCNBBrakes - Electric brakes on trailer inoperative due to electrical cable unplugged11—Vehicle Maintenance
FMCSR:393.110BCargo securement - logs117Vehicle Maintenance
FMCSR:393.19Hazard warning signal inoperable103Vehicle Maintenance
FMCSR:393.70D8Coupling devices defective108Vehicle Maintenance
FMCSR:393.80Exhaust system defective104Vehicle Maintenance
FMCSR:393.11SLighting devices/reflectors103Vehicle Maintenance
FMCSR:392.2WOperating a CMV while ill or fatigued108Unsafe Driving
FMCSR:391.41APhysical qualification - general107Driver Fitness
FMCSR:393.60CGlazing/window obstructions104Vehicle Maintenance
FMCSR:393.70(d)(8)Coupling devices defective118Vehicle Maintenance
FMCSR:393.110(b)Cargo securement - logs117Vehicle Maintenance
FMCSR:392.9(a)Operating without proper operating authority118General/Admin
FMCSR:393.75(a)(1)Tire-ply or belt material exposed11—Vehicle Maintenance
FMCSR:393.75(b)Tire tread depth insufficient (steer)107Vehicle Maintenance
FMCSR:393.26Requirements for reflectors10—Vehicle Maintenance
FMCSR:392.9AOperating without proper operating authority118General/Admin
FMCSR:393.110Cargo securement - logs117Vehicle Maintenance
FMCSR:392.8Failing to inspect/use emergency equipment10—Unsafe Driving
FMCSR:393.41No or defective parking brake system on CMV11—Vehicle Maintenance
FMCSR:390.21(g)(3)390.21(g)(3)10—General/Admin

Peer Context

This carrier vs national averages. Lower is better for all metrics.

Vehicle OOS Rate
66.7%vs nat'l 23.4%
+43.3 pts above avg
Driver OOS Rate
38.1%vs nat'l 6.7%
+31.4 pts above avg
Violations / Inspection
9.62vs nat'l 1.80
+7.82 above avg

National averages: vehicle OOS 23.4%, driver OOS 6.7%, violations per inspection ~1.8. Based on FMCSA MCSAP program data.

Inspection History (21 inspections)

fmcsa-inspectionsApr 5, 2026
Inspection History (21 inspections)
DateReport #StationStateLevelVehicleViolationsTop CodesOOS
Feb 18, 202687103731RoadsideTXLevel 2CHEV STRAIGHT TRUCK21393.48A, 393.9, 396.17CYes
Dec 4, 202586493737RoadsideTXLevel 2FORD STRAIGHT TRUCK3383.23A2, 390.21(a), 393.110BYes
Oct 13, 202586071974RoadsideTXLevel 1VACT SEMI-TRAILER22393.9, 392.2RG, 396.17CYes
Aug 18, 2025855855569407 US281 SBTXLevel 2FORD STRAIGHT TRUCK2390.21(a), 393.95ANo
May 6, 202584655715US281 AT FM 2557TXLevel 2FORD STRAIGHT TRUCK4390.21(a), 393.11S, 393.9No
Apr 23, 202584498331E HIGHLINE RDTXLevel 2INTE SEMI-TRAILER5392.2RG, 392.9BA-INACTIVE, 393.9Yes
Mar 13, 202584133048RoadsideTXLevel 1INTE SEMI-TRAILER0—No
Jan 18, 202583674404RoadsideTXLevel 2FORD LIMOUSINE8396.17C, 392.2RG, 390.21(a)Yes
Dec 7, 202483389932US281 SB FALFURRIAS SCALETXLevel 2FORD STRAIGHT TRUCK3393.95A, 396.17C, 392.2RGNo
Oct 22, 202483029438FM 509TXLevel 2RAM STRAIGHT TRUCK18393.43D, 393.9, 392.2RGYes
Sep 27, 202482827417MILITARY W/B AT FM 4TXLevel 2RAM STRAIGHT TRUCK11396.17(c), 392.2, 390.21(a)Yes
Aug 16, 2024824259611701 US281TXLevel 2OTHR SEMI-TRAILER6396.17(c), 390.21(a), 393.95(a)No
Aug 14, 202482461467US 281TXLevel 2FORD STRAIGHT TRUCK7396.17(c), 390.21(a), 393.110(b)Yes
Aug 2, 202482339221RoadsideTXLevel 2BIGT SEMI-TRAILER14396.17(c), 392.2, 383.23(a)(2)Yes
Jul 22, 202482194156RoadsideTXLevel 2OTHR SEMI-TRAILER4396.17(c), 390.21(a), 392.2No
May 15, 202481644808RoadsideTXLevel 2FRHT STRAIGHT TRUCK18393.9(a), 392.2, 393.11Yes
Dec 12, 2023803970589001 US281 SBTXLevel 2BIGT SEMI-TRAILER13396.17C, 392.2RG, 390.21(a)Yes
Nov 30, 2023803034579407 US281 SBTXLevel 2DODG STRAIGHT TRUCK9393.9(a), 392.2, 383.23(a)(2)Yes
Nov 27, 202380270980RoadsideTXLevel 2OTHR SEMI-TRAILER15393.9(a), 396.17(c), 383.23(a)(2)Yes
Nov 27, 202380314746US 281 AND FM 493TXLevel 2FORD STRAIGHT TRUCK10393.104(f)(3), 390.21(a), 393.100(a)Yes
Jul 28, 202379321042RoadsideTXLevel 2FORD STRAIGHT TRUCK9393.9(a), 390.21(g)(3), 393.130Yes

Inspection analytics

Monthly cadence, frequent stations, and violation mix

Inspections per month (24 mo)

16 total · 62.5% OOS
2024-052026-02
InspectionsOOS

Most frequent inspection stations

9407 US281 SB2 · 1 OOS
9001 US281 SB1 · 1 OOS
E HIGHLINE RD1 · 1 OOS
FM 5091 · 1 OOS
MILITARY W/B AT FM 41 · 1 OOS
US 2811 · 1 OOS
US 281 AND FM 4931 · 1 OOS
US281 AT FM 25571

Violations by BASIC category

Vehicle Maintenance133 · 29 OOS
Unsafe Driving36 · 1 OOS
General/Admin19 · 2 OOS
Driver Fitness14 · 10 OOS

Compliance Timeline

2 events merged from authority, insurance, enforcement, OOS, crash, MCS-150, and safety rating records

Apr 30, 2025
OOS
OOS order rescinded
Intrastate Out of Service
Dec 31, 2022
OOS
OOS order issued
Intrastate Out of Service

Related Records

Related records

StateAll entities in Texas
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CityEntities in BROWNSVILLE, TX
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Crashes0 crash records
FMCSA Crash File
Inspections21 inspection records
Full inspection history
Station9407 US281 SB
2 inspections at this station
StationUS281 AT FM 2557
1 inspection at this station
StationE HIGHLINE RD
1 inspection at this station
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Data sources & freshness

FMCSA Company Census File
Generated from 24-hour old database. Contact info and fleet counts may lag.
Updated 1 weeks ago
FMCSA Authority History
Updated 1 weeks ago
FMCSA Insurance Filings
Updated 1 weeks ago
FMCSA Vehicle Inspection File
Updated 1 weeks ago
Refresh dataLast updated: Apr 5, 2026