Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N8MO callsign genealogy
Currently held by OWENS, MARSHALL 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 N8MO's current licensee, walking backwards.
- ALTMAN, SHAWN DOHgranted 2009-06-18cancelled 2009-09-11
Successor callsigns
Callsigns held now by people who previously held N8MO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N8MO, oldest first.
- OWENS, MARSHALL E FL1997-08-21 → cancelled 2009-08-22
- ALTMAN, SHAWN D OH2019-10-08 active