Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KO4WR callsign genealogy
Currently held by SHEEHAN, JAMES F
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 KO4WR's current licensee, walking backwards.
- SHEEHAN, JAMES FMEgranted 2022-11-29
Successor callsigns
Callsigns held now by people who previously held KO4WR.
- SHEEHAN, JAMES FMEgranted 2022-11-29