Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W7OZZ callsign genealogy
Currently held by Osborn, Mark T
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 W7OZZ's current licensee, walking backwards.
- Osborn, Mark TORgranted 2013-08-05cancelled 2015-01-09
Successor callsigns
Callsigns held now by people who previously held W7OZZ.
No current licensee on record previously held this callsign.