Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC3HDJ callsign genealogy
Currently held by O Donnell Jr, Lawrence 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 KC3HDJ'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 KC3HDJ.
- O Donnell Jr, Lawrence JPAgranted 2016-09-07