Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W0JCM callsign genealogy
Currently held by Mattson, Jamie C
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 W0JCM's current licensee, walking backwards.
- Mattson, Jamie CNDgranted 2023-04-11cancelled 2023-07-15
Successor callsigns
Callsigns held now by people who previously held W0JCM.
- MILLER, JOHN CWAgranted 2019-07-16
All historical holders
Every license row we've seen with the callsign W0JCM, oldest first.
- MILLER, JOHN C WA2019-02-01 → cancelled 2019-07-16
- Mattson, Jamie C ND2023-07-15 active