Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AD9CB callsign genealogy
Currently held by ALCOCK, JOHN M
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 AD9CB's current licensee, walking backwards.
- Reeder Jr, Randell JINgranted 2022-05-10cancelled 2026-04-28
Successor callsigns
Callsigns held now by people who previously held AD9CB.
- ALCOCK, JOHN MILgranted 2023-06-06
All historical holders
Every license row we've seen with the callsign AD9CB, oldest first.
- ALCOCK, JOHN M IL2021-04-01 → cancelled 2023-06-06
- Reeder Jr, Randell J IN2026-04-28 active