Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9YP callsign genealogy
Currently held by Stevens, William C
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 K9YP's current licensee, walking backwards.
- Butler III, Robert TLAgranted 2024-03-07cancelled 2024-08-02
Successor callsigns
Callsigns held now by people who previously held K9YP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9YP, oldest first.
- Stevens, William C IL2012-07-14 → cancelled 2024-07-16
- Butler III, Robert T LA2024-08-02 active