Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W9MJO callsign genealogy
Currently held by OConnell, Martin J
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 W9MJO's current licensee, walking backwards.
- O'Connell, Martin JILgranted 2006-12-19cancelled 2007-03-27
Successor callsigns
Callsigns held now by people who previously held W9MJO.
No current licensee on record previously held this callsign.