Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KE4MLR callsign genealogy
Currently held by Ribaudo, Mary 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 KE4MLR's current licensee, walking backwards.
- Ribaudo, Mary LFLgranted 2015-10-09cancelled 2016-01-15
Successor callsigns
Callsigns held now by people who previously held KE4MLR.
- RIBAUDO, MARY LFLgranted 2025-12-24
All historical holders
Every license row we've seen with the callsign KE4MLR, oldest first.
- MC CAFFREY, ROBERT B FL1994-06-14 → cancelled 2006-06-15
- Ribaudo, Mary L FL2016-01-15 → cancelled 2016-02-06