Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W6FFF callsign genealogy
Currently held by Mueller, Patrick
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 W6FFF's current licensee, walking backwards.
- Mueller, PatrickCAgranted 2020-08-03cancelled 2020-08-28
Successor callsigns
Callsigns held now by people who previously held W6FFF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W6FFF, oldest first.
- WALKER, FREDERICK M CA2007-11-27 → cancelled 2020-02-07
- Mueller, Patrick CA2020-08-28 active