Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KJ6F callsign genealogy
Currently held by KELLER, KARL B
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 KJ6F's current licensee, walking backwards.
- Townsend, Edward WCAgranted 2015-02-25cancelled 2016-10-25
Successor callsigns
Callsigns held now by people who previously held KJ6F.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KJ6F, oldest first.
- KELLER, KARL B CA2004-10-05 → cancelled 2016-10-06
- Townsend, Edward W CA2016-10-25 active