Carrier profile · USDOT 3606119 · Updated Jun 13, 2026

STX UNDERGROUND LLC

2 power unitsavg 6.8 yrLocal · 1 statesBROWNSVILLE, TX74/100

AUTHORITY STATUS UNKNOWNHAZMAT

Observed fleet · trailing 24 mo daily

2Power units

5 observed · MCS-150

7Trailers seen

Decoded · vPIC

6.8Avg age (yr)

1999–2024 · vPIC

Call dispatch(956) 572-7466 Email dispatchSTXUNDERGROUNDLLC@GMAIL.COM

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Load decision · FMCSA snapshot · Jun 13, 2026

Review before loading

Operating, but with flags a broker should weigh before tendering freight.

Established 5 yearsNo reported crashesVehicle out-of-service rate well above average

Watch · 2

Vehicle out-of-service rate well above average64.3% of vehicle inspections were placed out of service vs the 22.26% national average.Driver out-of-service rate well above average35.7% of driver inspections were placed out of service vs the 6.7% national average.

In good standing · 2

Established 5 yearsOperating authority has been on file since 2021.No reported crashesNo DOT-reportable crashes are on this carrier's record.

USDOT registration

yr registered

Authority not on file

Insurance (BIPD)— unknown

No filing on record

Vehicle OOS · 24-mo64.3%

▲ 22.26% nat'l

Crashes · fatal

Clean · 24 mo

USDOT registration

yr registered

Authority not on file

Insurance (BIPD)— unknown

No filing on record

Vehicle OOS · 24-mo64.3%

▲ 22.26% nat'l

Crashes · fatal

Clean · 24 mo

Vektor intelligence · beyond the federal recordProprietary signals computed from VIN-decoded inspections & daily FMCSA snapshots

Fleet typeIdentity

Owner-operator

2 power units. Brokers price each fleet type apart.

Fleet age vs peersTypical

6.8 yr

Model years 1999–2024 · peer benchmark unavailable.

Identity stabilityStable

5 yr unchanged

Same registration since 2021 — no chameleon / reincarnation signal.

Safety

14 inspections · 24 mo · vs national benchmarks

Out-of-service rate· 24-mo cumulative · vs national

Vehicle OOS 64.3%24-mo cumulative

050%nat'l 22.26%

Driver OOS 35.7%24-mo cumulative

030%nat'l 6.67%

Every inspection in the window pooled — 14 vehicle and 14 driver inspections over 24 months.

Vehicle OOS rate· vehicle OOS · vehicle-level inspections · 6-month trailing

66.7% · latest 6-mo window▼ Falling

Share of vehicle-level roadside inspections in each trailing six-month window that resulted in a vehicle out-of-service order. Trending down 17.7 pts across the window. The national vehicle benchmark uses the same metric and is shown on the chart.

Roadside inspection history· 24 charted calendar months · vehicle / driver level · any-OOS overlay

12 inspections in the charted months · busiest month Sep '24 · 1

Vehicle-levelDriver-levelAny OOS

Monthly FMCSA roadside inspections across the 24 charted calendar months. Bars show level-qualified vehicle and driver populations; one inspection can qualify for both. The line shows inspections with any out-of-service result.

Inspection coverage· expected vs observed · the fraud signal

Inspection coverage

How heavily FMCSA inspects this fleet for its size — it tells you how much to trust the safety signals above. Thin coverage on a young authority is a fraud signal nobody else surfaces.

Heavily inspected

Under-inspected

Expected

Well-monitored

Heavily inspected

≈3.5 / unit·yr

thin signalabundant signal

Among the more heavily-inspected carriers for its size — abundant roadside signal. Coverage isn't the question here; the out-of-service and crash record is.

Registered power units: 2
Inspections · 24 mo: 14
Annualized: ≈7 / yr
Coverage: ≈3.5 inspections / unit · yr

Violation themes· decoded · grouped by BASIC

What this carrier actually gets cited for — FMCSA violation codes decoded into plain English, ranked by frequency.

392.2 State/local traffic law violation (speeding, etc.)Unsafe Driving33 · 0 OOS
393.9 Inoperative required lampsVehicle Maintenance29 · 2 OOS
393.95 Emergency equipment (extinguisher, triangles)Vehicle Maintenance25 · 0 OOS
396.17 Periodic (annual) inspectionVehicle Maintenance24 · 0 OOS
390.21 USDOT number marking on vehicleUnsafe Driving17 · 0 OOS
393.43 Parts & accessories (vehicle condition)Vehicle Maintenance10 · 7 OOS
383.23 Operating without a valid CDLDriver Fitness8 · 8 OOS
396.3 Inspection / repair / maintenance not performedVehicle Maintenance7 · 7 OOS
393.11 Required lamps/reflectors missingVehicle Maintenance6 · 0 OOS
393.75 Tires (defective / underinflated / worn)Vehicle Maintenance6 · 2 OOS

Explore full safety record — inspections, BASICs, crashes

Authority & insurance

Can they legally + adequately haul your load?

Insurance continuity· insurer · policy · lapses

No insurance filing history on record.

This timeline is the FMCSA filing history, and it ends at the most recent superseded filing — current policy status is not tracked here. Request a certificate of insurance to confirm active coverage before tendering.

Explore full authority & insurance record

Equipment & fleet

VIN-decoded · NHTSA vPIC

Capacity· power units = haulable capacity; trailers are towed

Registered power units (MCS-150): 2
Observed power (24 mo): 5
Trailers (towed): 7

Capacity is power units only — trailers are towed equipment and are never summed into a fleet-size figure.

Fleet age· model years · decoded VINs

6.8 yr

Average age

2024

Newest model yr

1999

Oldest model yr

25.0%

VINs decoded

Explore full fleet — VIN roster, equipment mix, age distribution

Operations & lanes

Revealed by inspection density across 1 states · 24 mo

Operating footprint· revealed by roadside-inspection geography

Operating radiusLocal

revealed

States observed

US states

Inspections · 24 mo

TX busiest

Inspection density by state· each tile = a state · shade = inspections, last 24 mo

Home base

BROWNSVILLE, TX

1511 LOS SABALES DR

Top corridor

TX 14

Density

fewermore

Shade = roadside inspections, last 24 mo.

See the full operating map — state density, top lanes

Network & fraud

Affiliated entities & reincarnation signals · for review, not a verdict

Last 12 months: 1 truck also ran under 1 other carrier

VINs inspected under this carrier were recently inspected under other USDOTs too — the active double-broker / shared-equipment signal: USDOT 4009737Some overlap is legitimate (leased or sold equipment); review alongside the other signals.

Shares a company officer with other carriers

rolando martinez jr. — 2 carriers: USDOT 3137403

Capacity consistency· registered vs roadside-observed power units

Registered (MCS-150)

Observed (24 mo)

Shared w/ other carriers

Roadside-observed power units materially exceed the registered MCS-150 fleet — confirm the carrier is operating within its filed capacity.

Explore the carrier network & VIN cross-links

Identity & contact

FMCSA census + L&I dossier

Location

Physical address: 1511 LOS SABALES DR, BROWNSVILLE, TX, 78520
Operation: Intrastate (Non-Hazmat)· Hazmat

Contact

Phone: (956) 572-7466
Email: stxundergroundllc@gmail.com

Registration

Officer: Rolando Martinez Jr.
USDOT / docket: 3606119
First registered: Apr 6, 2021
Last MCS-150: May 13, 2025 · 202 mi (2024)
FMCSA safety rating: Not rated
D-U-N-S: —

Fleet (self-reported · MCS-150)

Power units

Drivers

CDL drivers

202

Annual mileage

Open the full identity & federal record

Federal activity

Daily-captured FMCSA licensing & insurance changes — monitored by Vektor

Federal record activity· monitored daily by Vektor

No licensing or insurance changes captured since Vektor began monitoring this carrier (June 2026). Quiet is usually good.

Open the full federal-record activity feed

Reviews

Verified broker, shipper & driver reviews — moderated

Performance ratings only — never the Vektor risk score

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Verification summaryAuthority, insurance, safety and identity facts for STX UNDERGROUND LLC.

STX UNDERGROUND LLC (USDOT 3606119) has a Vektor safety score of 74/100 and a Review before loading verdict, from the carrier's FMCSA record refreshed Jun 13, 2026.

The carrier has an unknown current for-hire authority status because no FMCSA L&I authority row is available as of Jun 13, 2026.

It has an unknown current BIPD insurance status because no FMCSA L&I active-filing snapshot is available as of Jun 13, 2026.

Its vehicle out-of-service rate was 64.3% over the last 24 months, versus the 22.26% CVSA national average, from FMCSA roadside-inspection data refreshed Jun 13, 2026.

The carrier received 14 roadside inspections in the last 24 months — 14 vehicle-level and 14 driver-level — across 1 state, according to FMCSA roadside-inspection data refreshed Jun 13, 2026.

The carrier has 0 reportable crashes in the last 24 months and 0 fatal crashes across the full FMCSA crash record available as of Jun 13, 2026.

It reports 2 power units and 2 drivers in its most recent MCS-150 filing dated May 13, 2025.

It has no FMCSA-assigned safety rating in the federal record refreshed Jun 13, 2026.

Frequently asked

What is STX UNDERGROUND LLC's USDOT number?

STX UNDERGROUND LLC's USDOT number is 3606119.

Is STX UNDERGROUND LLC authorized to operate?

As of Jun 13, 2026, STX UNDERGROUND LLC is active in the FMCSA register.

What is STX UNDERGROUND LLC's safety record?

STX UNDERGROUND LLC has a 64.3% vehicle out-of-service rate (national average 22.26%) across 22 roadside inspections, with 0 reportable crashes in the last 24 months, and is not currently rated by FMCSA. Vektor's computed risk score is 74/100 (tier: review).