Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KA0YKO callsign genealogy
Currently held by ZIMMERLY, WILLIAM B
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 KA0YKO'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 KA0YKO.
- ZIMMERLY, WILLIAM BMOgranted 2011-12-02cancelled 2023-12-05