Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7MAM callsign genealogy
Currently held by MARROWSTONE ISLAND RADIO CLUB
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 K7MAM's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K7MAM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K7MAM, oldest first.
- MARROWSTONE ISLAND RADIO CLUB WA1999-02-26 → cancelled 2003-10-21
- MATTSON, MINDI A WA2019-12-04 active