Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KA1RFZ callsign genealogy
Currently held by Clarke, Thomas L
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 KA1RFZ's current licensee, walking backwards.
- N1QNUcancelledcancelled 1998-04-22
Successor callsigns
Callsigns held now by people who previously held KA1RFZ.
- Clarke, Thomas LFLgranted 2006-07-25cancelled 2018-07-26