Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA5CDU callsign genealogy
Currently held by Lear, John A
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 KA5CDU's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KA5CDU.
No current licensee on record previously held this callsign.