Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KK4ACE callsign genealogy
Currently held by Oh, Christopher 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 KK4ACE's current licensee, walking backwards.
- Oh, Christopher DNJgranted 2024-02-02cancelled 2024-03-16
Successor callsigns
Callsigns held now by people who previously held KK4ACE.
- Oh, Christopher DNJgranted 2026-08-08
All historical holders
Every license row we've seen with the callsign KK4ACE, oldest first.
- Filamini, Nicholas J FL2011-02-03 → cancelled 2023-02-04
- Oh, Christopher D NJ2024-03-16 → cancelled 2026-08-08