Confidence: Medium · Source: FCC ULS · As of 2026-11-04
K6MAI callsign genealogy
Currently held by Irwin, Mark
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 K6MAI's current licensee, walking backwards.
- Irwin, MarkCAgranted 2026-04-28cancelled 2026-09-18
Successor callsigns
Callsigns held now by people who previously held K6MAI.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K6MAI, oldest first.
- INNIS, MICHAEL A CO2013-04-16 → cancelled 2025-04-17
- Irwin, Mark CA2026-09-18 active