Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KT4OC callsign genealogy
Currently held by TANKLEFF, BRUCE A
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 KT4OC's current licensee, walking backwards.
- Tankleff, Bruce ATXgranted 2023-03-14cancelled 2023-04-01
Successor callsigns
Callsigns held now by people who previously held KT4OC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KT4OC, oldest first.
- TANKLEFF, BRUCE A TX1996-04-08 → cancelled 2007-11-24
- Tankleff, Bruce A TX2023-04-01 active