Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KK4LEO callsign genealogy
Currently held by GREEN, MICHAEL S
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 KK4LEO's current licensee, walking backwards.
- GREEN, MICHAEL SFLgranted 2011-07-01cancelled 2011-07-29
Successor callsigns
Callsigns held now by people who previously held KK4LEO.
- GREEN, MICHAEL SFLgranted 2023-08-26