Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KF7JIO callsign genealogy
Currently held by SPERRY, JOHN W
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 KF7JIO's current licensee, walking backwards.
- SPERRY, JOHN WMTgranted 2010-02-11cancelled 2010-04-21
Successor callsigns
Callsigns held now by people who previously held KF7JIO.
- SPERRY, JOHN WMTgranted 2020-03-24