Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K2MMS callsign genealogy
Currently held by SCHUMAKER, FREDERICK M
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 K2MMS's current licensee, walking backwards.
- Schmidt, MatthiasNYgranted 2018-08-22cancelled 2018-09-11
Successor callsigns
Callsigns held now by people who previously held K2MMS.
- SCHUMAKER, FREDERICK MNYgranted 2012-03-10cancelled 2024-03-12
All historical holders
Every license row we've seen with the callsign K2MMS, oldest first.
- SCHUMAKER, FREDERICK M NY2004-07-30 → cancelled 2012-03-10
- Schmidt, Matthias NY2018-09-11 active