Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD4SJR callsign genealogy
Currently held by Ryan, Stephen J
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 KD4SJR's current licensee, walking backwards.
- Ryan, Stephen JTNgranted 2011-01-31cancelled 2020-05-16
Successor callsigns
Callsigns held now by people who previously held KD4SJR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD4SJR, oldest first.
- BOWCUTT, COREY H FL1992-11-10 → cancelled 2004-11-11
- Ryan, Stephen J TN2020-05-16 active