Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4MMJ callsign genealogy
Currently held by JONES, MARK 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 W4MMJ's current licensee, walking backwards.
- JONES, MARK MNCgranted 2004-07-01cancelled 2007-07-31
Successor callsigns
Callsigns held now by people who previously held W4MMJ.
No current licensee on record previously held this callsign.