Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AD0UM callsign genealogy
Currently held by Klink, David F
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 AD0UM's current licensee, walking backwards.
- Klink, David FCOgranted 2013-03-26cancelled 2016-05-19
Successor callsigns
Callsigns held now by people who previously held AD0UM.
- Klink, David FCOgranted 2016-08-12