Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4DUM callsign genealogy
Currently held by BIRDSEYE, MICHAEL
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 K4DUM's current licensee, walking backwards.
- BIRDSEYE, MICHAELVAgranted 2011-06-09cancelled 2011-06-28
Successor callsigns
Callsigns held now by people who previously held K4DUM.
No current licensee on record previously held this callsign.