Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KF4DOU callsign genealogy
Currently held by Watson Sr, John J
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 KF4DOU's current licensee, walking backwards.
- WA8UVUno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held KF4DOU.
- Watson Sr, John JKYgranted 1995-09-26cancelled 2007-09-27