Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AI7MS callsign genealogy
Currently held by Subocz, Mikolaj
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 AI7MS's current licensee, walking backwards.
- Subocz, MikolajWAgranted 2019-07-09cancelled 2020-08-11
Successor callsigns
Callsigns held now by people who previously held AI7MS.
- Sparks, Marian MORgranted 2012-03-27cancelled 2012-06-30
All historical holders
Every license row we've seen with the callsign AI7MS, oldest first.
- Sparks, Marian M OR2011-11-08 → cancelled 2012-03-27
- Subocz, Mikolaj WA2020-08-11 active