Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9SEA callsign genealogy
Currently held by Lyon, Robert K
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 K9SEA's current licensee, walking backwards.
- Lyon, Robert KINgranted 2019-05-10cancelled 2019-07-23
Successor callsigns
Callsigns held now by people who previously held K9SEA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9SEA, oldest first.
- SHUMAKER, LARRY E IL2006-11-08 → cancelled 2018-11-20
- Lyon, Robert K IN2019-07-23 active