Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AF5ZY callsign genealogy
Currently held by Koster Jr, Glenn J
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 AF5ZY'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 AF5ZY.
- Koster Jr, Glenn JKYgranted 2025-07-10