Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KN4OM callsign genealogy
Currently held by DRUMMER, MARK A
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 KN4OM's current licensee, walking backwards.
- KD2IRLcancelledOMISSNYgranted 2015-05-05cancelled 2015-08-01
Successor callsigns
Callsigns held now by people who previously held KN4OM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KN4OM, oldest first.
- DRUMMER, MARK A FL2001-06-05 → cancelled 2012-09-05
- OMISS IA2025-08-02 active