Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K7OEH callsign genealogy
Currently held by Mason, Mark A
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 K7OEH's current licensee, walking backwards.
- Mason, Mark AORgranted 2015-09-17cancelled 2015-10-06
Successor callsigns
Callsigns held now by people who previously held K7OEH.
No current licensee on record previously held this callsign.