Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4SFX callsign genealogy
Currently held by Kiselica Jr, John N
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 W4SFX's current licensee, walking backwards.
- Kiselica Jr, John NSCgranted 2023-10-17cancelled 2024-01-23
Successor callsigns
Callsigns held now by people who previously held W4SFX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4SFX, oldest first.
- ALDERMAN, GEORGE T FL2006-04-04 → cancelled 2018-06-19
- Kiselica Jr, John N SC2024-01-23 active