Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA4RYO callsign genealogy
Currently held by HEATH, MARSHALL A
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 KA4RYO's current licensee, walking backwards.
- HEATH, MARSHALL AFLgranted 2008-05-01cancelled 2008-06-10
Successor callsigns
Callsigns held now by people who previously held KA4RYO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KA4RYO, oldest first.
- HEATH, MARSHALL A FL1995-07-20 → cancelled 2007-07-21
- HEATH, MARSHALL A FL2018-05-30 active