Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA1EZF callsign genealogy
Currently held by O BRIEN III, WILLIAM H
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 KA1EZF's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KA1EZF.
- O BRIEN III, WILLIAM HRIgranted 2018-11-07