Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9DF callsign genealogy
Currently held by FILMER, DAVID L
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 W9DF's current licensee, walking backwards.
- FILMER, DAVID LINgranted 1997-09-18cancelled 2000-06-23
Successor callsigns
Callsigns held now by people who previously held W9DF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9DF, oldest first.
- FRUTH, EDWARD A IL1988-03-29 → cancelled 2000-03-30
- FILMER, DAVID L IN2020-04-10 active