Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB4WTF callsign genealogy
Currently held by WING MR, JOSEPH F
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 KB4WTF's current licensee, walking backwards.
- Cararo, SalvatoreFLgranted 2022-10-12cancelled 2022-11-04
Successor callsigns
Callsigns held now by people who previously held KB4WTF.
- DZIUBA, MICHAEL JTNgranted 2020-09-18cancelled 2021-09-11
All historical holders
Every license row we've seen with the callsign KB4WTF, oldest first.
- WING MR, JOSEPH F AR2007-08-22 → cancelled 2019-08-27
- DZIUBA, MICHAEL J TN2020-06-09 → cancelled 2020-09-18
- Cararo, Salvatore FL2022-11-04 active