Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7RYO callsign genealogy
Currently held by HOLLAND, 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 K7RYO's current licensee, walking backwards.
- HOLLAND, MARK TORgranted 1999-04-15cancelled 1999-11-17
Successor callsigns
Callsigns held now by people who previously held K7RYO.
No current licensee on record previously held this callsign.