Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4MOO callsign genealogy
Currently held by Moser Jr, Martin 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 K4MOO's current licensee, walking backwards.
- Moser Jr, Martin LFLgranted 2023-05-23cancelled 2023-06-22
Successor callsigns
Callsigns held now by people who previously held K4MOO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4MOO, oldest first.
- GREENVILLE CONTEST CLUB NC2010-02-25 → cancelled 2022-02-26
- Moser Jr, Martin L FL2023-06-22 active