Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7DN callsign genealogy
Currently held by SOMMER, FRANCIS 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 K7DN's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K7DN.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K7DN, oldest first.
- SOMMER, FRANCIS F AZ1999-12-17 → cancelled 2001-11-06
- Yellen, Matthew F AK2024-12-12 active