Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4BLL callsign genealogy
Currently held by Watt Jr, William 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 K4BLL's current licensee, walking backwards.
- Watt Jr, William AGAgranted 2005-09-23cancelled 2006-01-10
Successor callsigns
Callsigns held now by people who previously held K4BLL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4BLL, oldest first.
- NOEL, CLIFFORD E FL1987-10-20 → cancelled 1999-10-21
- Watt Jr, William A GA2025-11-20 active