Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W3FU callsign genealogy
Currently held by KOEHLER, WOLF
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 W3FU's current licensee, walking backwards.
- KOEHLER, WOLFCAgranted 1991-08-13cancelled 2000-08-08
Successor callsigns
Callsigns held now by people who previously held W3FU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W3FU, oldest first.
- FRIEL JR, FRED J MD1987-12-08 → cancelled 1999-12-09
- KOEHLER, WOLF CA2020-09-01 active