Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4BYB callsign genealogy
Currently held by Prosser, Daryl 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 K4BYB's current licensee, walking backwards.
- Prosser, Daryl AGAgranted 2025-12-09cancelled 2026-01-03
Successor callsigns
Callsigns held now by people who previously held K4BYB.
- Cruz, James LFLgranted 2020-06-30
All historical holders
Every license row we've seen with the callsign K4BYB, oldest first.
- Cruz, James L FL2019-07-30 → cancelled 2020-06-30
- Prosser, Daryl A GA2026-01-03 active