Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4ON callsign genealogy
Currently held by Johnson, Emily
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 K4ON's current licensee, walking backwards.
- Johnson, EmilyMDgranted 2017-10-23cancelled 2017-12-19
Successor callsigns
Callsigns held now by people who previously held K4ON.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4ON, oldest first.
- Karpathy, Oliver C TN2005-09-09 → cancelled 2017-11-29
- Johnson, Emily MD2017-12-19 active