Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4MDO callsign genealogy
Currently held by Ogden, Mark
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 W4MDO's current licensee, walking backwards.
- Ogden, Mark DFLgranted 1999-12-18cancelled 2008-03-04
Successor callsigns
Callsigns held now by people who previously held W4MDO.
No current licensee on record previously held this callsign.