Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC0YP callsign genealogy
Currently held by Zimmer, Michael
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 AC0YP'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 AC0YP.
- Zimmer, MichaelCOgranted 2012-02-11cancelled 2024-02-13