Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD4ALY callsign genealogy
Currently held by PATTERSON, ROGER C
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 KD4ALY's current licensee, walking backwards.
- Adair, Thomas TTNgranted 2012-03-23cancelled 2012-04-20
Successor callsigns
Callsigns held now by people who previously held KD4ALY.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD4ALY, oldest first.
- PATTERSON, ROGER C AL1991-05-14 → cancelled 2003-05-15
- ADAIR, THOMAS T Al2022-02-16 active