Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KE4YCF callsign genealogy
Currently held by BAUMANN, RUSSELL 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 KE4YCF's current licensee, walking backwards.
- BAUMANN, RUSSELL MAZgranted 2018-10-22cancelled 2018-11-09
Successor callsigns
Callsigns held now by people who previously held KE4YCF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KE4YCF, oldest first.
- BAUMANN, RUSSELL M GA2005-03-15 → cancelled 2017-03-24
- BAUMANN, RUSSELL M AZ2018-11-09 active