Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KF4BS callsign genealogy
Currently held by Sublett, Benjamin 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 KF4BS's current licensee, walking backwards.
- Sublett, Benjamin JALgranted 2021-07-27cancelled 2022-03-04
Successor callsigns
Callsigns held now by people who previously held KF4BS.
- Mallow, Louis EFLgranted 2014-02-20cancelled 2026-05-19
All historical holders
Every license row we've seen with the callsign KF4BS, oldest first.
- Mallow, Louis E FL1994-05-17 → cancelled 2002-02-05
- Sublett, Benjamin J AL2022-03-04 active