Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KT4KA callsign genealogy
Currently held by SLONE, BILLY 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 KT4KA's current licensee, walking backwards.
- KK4BTGcancelledHam Radio Technology GroupVAgranted 2011-04-26cancelled 2011-12-30
Successor callsigns
Callsigns held now by people who previously held KT4KA.
- SLONE, BILLY JKYgranted 1997-11-19cancelled 2001-05-04
All historical holders
Every license row we've seen with the callsign KT4KA, oldest first.
- Ham Radio Technology Group VA2011-12-30 → cancelled 2024-01-03
- SLONE, BILLY J— → cancelled 1997-11-19