Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9MRK callsign genealogy
Currently held by LAKOMSKI, MARK S
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 K9MRK's current licensee, walking backwards.
- Klinkenberg, MarkMOgranted 2024-03-07cancelled 2024-04-09
Successor callsigns
Callsigns held now by people who previously held K9MRK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9MRK, oldest first.
- LAKOMSKI, MARK S IL2011-05-19 → cancelled 2023-04-04
- Klinkenberg, Mark MO2024-04-09 active