Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K7KNW callsign genealogy
Currently held by GRAEF, JOHN D
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 K7KNW's current licensee, walking backwards.
- Maddux, Karl JORgranted 2022-08-31cancelled 2022-09-20
Successor callsigns
Callsigns held now by people who previously held K7KNW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K7KNW, oldest first.
- GRAEF, JOHN D WA2007-12-17 → cancelled 2019-12-24
- Maddux, Karl OR2022-09-20 active