Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4DMM callsign genealogy
Currently held by Fernandez Jr, Robert Y
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 K4DMM's current licensee, walking backwards.
- Fernandez Jr, Robert YFLgranted 2011-04-13cancelled 2015-02-10
Successor callsigns
Callsigns held now by people who previously held K4DMM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4DMM, oldest first.
- FERNANDEZ SR, ROBERT Y FL2004-11-10 → cancelled 2013-04-16
- Fernandez Jr, Robert Y FL2015-02-10 active