Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W9JBL callsign genealogy
Currently held by LEONARD JR, JOHN 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 W9JBL's current licensee, walking backwards.
- STRANBERG, JONATHANILgranted 2022-11-22cancelled 2025-02-15
Successor callsigns
Callsigns held now by people who previously held W9JBL.
- LEONARD JR, JOHN BILgranted 2020-07-17
All historical holders
Every license row we've seen with the callsign W9JBL, oldest first.
- LEONARD JR, JOHN B IL2017-07-19 → cancelled 2020-07-17
- STRANBERG, JONATHAN IL2025-02-15 active