Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KL5UM callsign genealogy
Currently held by Serfass, Dana
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 KL5UM's current licensee, walking backwards.
- Serfass, DanaAKgranted 2024-07-19cancelled 2024-07-23
Successor callsigns
Callsigns held now by people who previously held KL5UM.
No current licensee on record previously held this callsign.