Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9DTF callsign genealogy
Currently held by DAHLER, HARVEY
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 K9DTF's current licensee, walking backwards.
- Linden III, Charles LFLgranted 2019-07-19cancelled 2019-08-06
Successor callsigns
Callsigns held now by people who previously held K9DTF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9DTF, oldest first.
- DAHLER, HARVEY WI1989-03-28 → cancelled 2001-03-29
- Linden III, Charles L FL2019-08-06 active