Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM5MK callsign genealogy
Currently held by FOUST, ERIC O
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 KM5MK's current licensee, walking backwards.
- GLYNN, CHARLES JTXgranted 2016-01-14cancelled 2016-02-09
Successor callsigns
Callsigns held now by people who previously held KM5MK.
- FOUST, ERIC OPAgranted 2019-02-26
All historical holders
Every license row we've seen with the callsign KM5MK, oldest first.
- FOUST, ERIC O PA1999-04-30 → cancelled 2001-03-01
- GLYNN, CHARLES J TX2025-11-19 active