Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K8JMM callsign genealogy
Currently held by Mielcarek Sr, Joseph 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 K8JMM's current licensee, walking backwards.
- Marras, JamesOHgranted 2025-08-02cancelled 2025-08-22
Successor callsigns
Callsigns held now by people who previously held K8JMM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K8JMM, oldest first.
- Mielcarek Sr, Joseph M MI2008-06-03 → cancelled 2020-06-04
- Marras, James OH2025-08-22 active