Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4JBO callsign genealogy
Currently held by OSBORN, JASON B
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by W4JBO's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W4JBO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4JBO, oldest first.
- PARKER, JESSIE E SC1988-06-14 → cancelled 2000-06-15
- OSBORN, JASON B FL2025-07-15 active