Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4YTB callsign genealogy
Currently held by HOOK, JOHN C
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 K4YTB's current licensee, walking backwards.
- HOOK, JOHN CFLgranted 2015-12-10cancelled 2017-01-04
Successor callsigns
Callsigns held now by people who previously held K4YTB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4YTB, oldest first.
- SILSBY, JOHN P FL2007-03-15 → cancelled 2015-01-15
- HOOK, JOHN C FL2017-01-04 active