Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N6MJK callsign genealogy
Currently held by Kacmarcik, Michael J
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 N6MJK's current licensee, walking backwards.
- Kacmarcik, Michael JCAgranted 2010-11-22cancelled 2016-02-12
Successor callsigns
Callsigns held now by people who previously held N6MJK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N6MJK, oldest first.
- SHAFFER, DAWN E CA1995-06-28 → cancelled 2007-06-29
- Kacmarcik, Michael J WV2025-12-23 active