Confidence: Medium · Source: FCC ULS · As of 2026-09-10
KF0YR callsign genealogy
Currently held by SWARTZELL, MARK A
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 KF0YR's current licensee, walking backwards.
- SWARTZELL, MARK ANDgranted 2020-04-17
Successor callsigns
Callsigns held now by people who previously held KF0YR.