Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K1BUM callsign genealogy
Currently held by Arizona Sun Bums Amateur Radio Club
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 K1BUM's current licensee, walking backwards.
- Phillips, Dean ANCgranted 2024-06-26cancelled 2024-07-16
Successor callsigns
Callsigns held now by people who previously held K1BUM.
- K7BUMactiveArizona Sun Bums Amateur Radio ClubAZgranted 2019-04-09
All historical holders
Every license row we've seen with the callsign K1BUM, oldest first.
- KNOWLTON, WINFRED C FL1997-05-27 → cancelled 2009-05-28
- Arizona Sun Bums Amateur Radio Club AZ2017-05-09 → cancelled 2019-04-09
- Phillips, Dean A NC2024-07-16 active