Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W6MJM callsign genealogy
Currently held by STEWART, HORTON E
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 W6MJM's current licensee, walking backwards.
- MUNSTER, MARVIN JCAgranted 2002-10-07cancelled 2007-07-24
Successor callsigns
Callsigns held now by people who previously held W6MJM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W6MJM, oldest first.
- STEWART, HORTON E CA1988-08-23 → cancelled 2000-08-24
- MUNSTER, MARVIN J CA2017-05-01 active