Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AJ4YP callsign genealogy
Currently held by Prast, William H
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 AJ4YP's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held AJ4YP.
- Prast, William HFLgranted 2010-05-11cancelled 2022-05-12