Confidence: Medium · Source: FCC ULS · As of 2026-09-15
KC6OXX callsign genealogy
Currently held by Mulcahy, Justin R
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 KC6OXX's current licensee, walking backwards.
- Mulcahy, JustinORgranted 2023-12-07cancelled 2023-12-29
Successor callsigns
Callsigns held now by people who previously held KC6OXX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC6OXX, oldest first.
- MULCAHY, ROBERT A CA2010-10-05 → cancelled 2023-01-04
- Mulcahy, Justin R OR2023-12-29 active