Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WK7O callsign genealogy
Currently held by Finn, Matthew E
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 WK7O's current licensee, walking backwards.
- Finn, Matthew EORgranted 2019-04-23cancelled 2019-10-01
Successor callsigns
Callsigns held now by people who previously held WK7O.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WK7O, oldest first.
- SWIFT, ROBERT N AZ2007-10-25 → cancelled 2017-07-31
- Finn, Matthew E OR2019-10-01 active