Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KK4T callsign genealogy
Currently held by HAAS, BOBBY L
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 KK4T's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KK4T.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KK4T, oldest first.
- HAAS, BOBBY L NC1998-06-12 → cancelled 2010-06-15
- HULLENDER JR, JOSEPH A NC2020-04-08 active