Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W9YCO callsign genealogy
Currently held by Wyco, Mark 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 W9YCO's current licensee, walking backwards.
- Wyco, Mark JILgranted 2025-02-21cancelled 2025-03-11
Successor callsigns
Callsigns held now by people who previously held W9YCO.
No current licensee on record previously held this callsign.