License Plate CA 4SX6423 (California) — Southbay Transport Inc
USDOT 1837973 · 2013 UNPUBLISHE
Recorded vehicle, plate and carrier history
These are dated observations in the records available to us. They do not establish ownership, a sale, a transfer date, or continuous use between observations. The latest observation may not describe today’s vehicle or carrier.
| Observed dates | VIN | Plate | Reported carrier |
|---|---|---|---|
| 2025-10-23 | 3R9R4TM20DM001981 | CA 4SX6423 | SOUTHBAY TRANSPORT INC · USDOT 1837973 |
| 2025-01-24 | 3R9R4TM20DM001981 | CA 4SX6423 | WILLIAMS IGNACIO NARCIA LEON · USDOT 3089559 |
| 2024-11-21 | 3R9R4TM20DM001981 | CA 4SX6423 | YAZMIN LILIANA FRAGOSO INZUNZA · USDOT 3756856 |
Evidence: FMCSA inspection observations and retained snapshots of our vehicle records. Coverage is incomplete; an unreported change cannot be dated from these records.
Most recently recorded carrier for this plate
Southbay Transport Inc Active
- USDOT
- 1837973
- MC
- 723987
- Status
- Active
- Type
- Motor Carrier
- Based in
- Calexico, CA
- Power units
- 1
- Drivers
- 1
- Inspections (24 mo)
- 85
- Crashes (24 mo)
- 0
- Vehicle OOS rate
- 20.5%
Carrier recorded at the latest inspection in the available records (2025-10-23). This does not establish current ownership or confirm that the carrier still operates this vehicle.
View full carrier profile →Authority, insurance & bonds, safety scores, crash history, inspections and the full fleet list.This plate has also been operated by 2 other carriers (listed below).
What this means
License plate CA-4SX6423 appears in FMCSA inspection records 5 times. Recorded on one vehicle: VIN 3R9R4TM20DM001981 (2013 UNPUBLISHE). Operated by 3 different carriers (DOT numbers) over its inspection history. Most recent operating carrier: Southbay Transport Inc (USDOT 1837973). Vehicle make on file: UNPUBLISHE (SEMI-TRAILER). No out-of-service violations are recorded under this plate in the available inspection records. Other violations may still be present.
About this plate
Commercial license plate CA-4SX6423 (California) appears in FMCSA roadside inspection records tied to one commercial vehicle. Inspection activity under this plate runs from 2024-11-06 to 2025-10-23. The latest inspection was in Texas, a Level III — driver and paperwork only. That is outside the plate's issuing jurisdiction (California).
Vehicle on this plate
This plate is associated with a single vehicle, a 2013 UNPUBLISHE — VIN 3R9R4TM20DM001981 (semi-trailer).
Combined inspection & out-of-service record
Across all vehicles on this plate there are 5 inspections on FMCSA record. No out-of-service violations appear in the available records under this plate. This does not mean that every inspection was free of other violations.
Operators
3 carriers have operated vehicles under this plate (most recent first): Southbay Transport Inc (USDOT 1837973) from 2025-07-22 to 2025-10-23; Williams Ignacio Narcia Leon (USDOT 3089559) from 2024-11-06 to 2025-01-24; Yazmin Liliana Fragoso Inzunza (USDOT 3756856) on 2024-11-21.