Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K7YHI callsign genealogy
Currently held by Criswell, Michael D
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 K7YHI's current licensee, walking backwards.
- Criswell, Michael DORgranted 2005-11-30cancelled 2010-05-11
Successor callsigns
Callsigns held now by people who previously held K7YHI.
No current licensee on record previously held this callsign.