Carrier profile · USDOT 3606119 · Updated Jun 13, 2026
STX UNDERGROUND LLC
2 power unitsavg 6.8 yrLocal · 1 statesBROWNSVILLE, TX74/100
AUTHORITY STATUS UNKNOWNHAZMAT
Identity & Federal
The official FMCSA identity — legal name, DBA, addresses, contact, officers, and registration — alongside the daily-captured federal-record activity feed, monitored daily by Vektor.
Location
- Physical address
- 1511 LOS SABALES DR, BROWNSVILLE, TX, 78520
- Operation
- Intrastate (Non-Hazmat)· Hazmat
Contact
- Phone
- (956) 572-7466
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)
MCS-150 filing history· biennial-update cadence
Per-filing MCS-150 history (each biennial update + the fleet/mileage it reported) is being captured from the daily federal feed and will appear here as we capture the full history.
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.