Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9EFM callsign genealogy
Currently held by WANTLAND, FREDERICK W
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 K9EFM's current licensee, walking backwards.
- Martin, Eric FILgranted 2012-05-10cancelled 2019-08-03
Successor callsigns
Callsigns held now by people who previously held K9EFM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9EFM, oldest first.
- WANTLAND, FREDERICK W TX1998-02-25 → cancelled 2010-02-26
- Martin, Eric F IL2019-08-03 active