Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4AFU callsign genealogy
Currently held by Ulloa, Adrian F
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 K4AFU's current licensee, walking backwards.
- Ulloa, Adrian FFLgranted 2024-10-12cancelled 2024-12-21
Successor callsigns
Callsigns held now by people who previously held K4AFU.