Confidence: Medium · Source: FCC ULS · As of 2026-09-09
K3KIU callsign genealogy
Currently held by Keyser, Sean M
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 K3KIU's current licensee, walking backwards.
- Keyser, Sean MFLgranted 2024-11-02
Successor callsigns
Callsigns held now by people who previously held K3KIU.
- Keyser, Sean MFLgranted 2024-11-02
All historical holders
Every license row we've seen with the callsign K3KIU, oldest first.
- KEYSER SR, RICHARD P FL1989-11-21 → cancelled 2002-03-07
- Keyser, Sean M FL2024-08-02 → cancelled 2024-11-02