Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4KKO callsign genealogy
Currently held by Keiber, Michael L
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 K4KKO's current licensee, walking backwards.
- Keiber, Michael LFLgranted 2015-05-04cancelled 2015-05-22
Successor callsigns
Callsigns held now by people who previously held K4KKO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4KKO, oldest first.
- DICKOVER, WILLIAM J TN1998-02-26 → cancelled 2010-02-27
- Keiber, Michael L FL2026-08-07 active