Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K1STW callsign genealogy
Currently held by Derryberry, Robert
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 K1STW's current licensee, walking backwards.
- Derryberry, RobertARgranted 2023-09-06cancelled 2023-09-26
Successor callsigns
Callsigns held now by people who previously held K1STW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K1STW, oldest first.
- LYNCH, C A PETER RI1997-11-11 → cancelled 2009-11-13
- Derryberry, Robert AR2023-09-26 active