Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9SDF callsign genealogy
Currently held by FARRIS, JOSEPH D
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 K9SDF's current licensee, walking backwards.
- FARRIS, JOSEPH DILgranted 2013-03-08cancelled 2013-08-09
Successor callsigns
Callsigns held now by people who previously held K9SDF.
No current licensee on record previously held this callsign.