Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K1AHN callsign genealogy
Currently held by Ahn, Wonbok
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 K1AHN's current licensee, walking backwards.
- Ahn, WonbokOHgranted 2018-06-18cancelled 2018-08-07
Successor callsigns
Callsigns held now by people who previously held K1AHN.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K1AHN, oldest first.
- OLIVIERI, JAMES MA2005-12-12 → cancelled 2018-03-02
- Ahn, Wonbok OH2018-08-07 active