Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KC7UJO callsign genealogy
Currently held by Johannsen, Christopher B
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 KC7UJO's current licensee, walking backwards.
- Johannsen, Christopher BORgranted 2021-11-09cancelled 2021-12-10
Successor callsigns
Callsigns held now by people who previously held KC7UJO.
- Johannsen, Christopher BORgranted 2022-12-28
All historical holders
Every license row we've seen with the callsign KC7UJO, oldest first.
- STANLEY, FRED C WA1997-02-03 → cancelled 2009-02-04
- Johannsen, Christopher B OR2021-12-10 → cancelled 2022-12-28