Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N5MMJ callsign genealogy
Currently held by McCool Jr, Mark 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 N5MMJ's current licensee, walking backwards.
- McCool Jr, Mark EOKgranted 2018-05-25cancelled 2018-07-06
Successor callsigns
Callsigns held now by people who previously held N5MMJ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N5MMJ, oldest first.
- HOEVELMAN, BETTY TX1988-04-26 → cancelled 2000-04-27
- McCool Jr, Mark E OK2018-07-06 active