Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4KUP callsign genealogy
Currently held by Gilkeson, John
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 W4KUP's current licensee, walking backwards.
- Gilkeson, JohnCAgranted 2021-09-28cancelled 2021-10-19
Successor callsigns
Callsigns held now by people who previously held W4KUP.
No current licensee on record previously held this callsign.