Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9YHA callsign genealogy
Currently held by Warmoth, William J
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 K9YHA's current licensee, walking backwards.
- Warmoth, William JILgranted 2009-09-22cancelled 2017-06-27
Successor callsigns
Callsigns held now by people who previously held K9YHA.
No current licensee on record previously held this callsign.