Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB9JDM callsign genealogy
Currently held by RICHARDSON, ROBERT A
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 KB9JDM's current licensee, walking backwards.
- Mays Jr, James DILgranted 2021-05-18cancelled 2021-07-27
Successor callsigns
Callsigns held now by people who previously held KB9JDM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB9JDM, oldest first.
- RICHARDSON, ROBERT A IN2004-11-17 → cancelled 2017-02-03
- Mays Jr, James D IL2021-07-27 active