Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WA9SDJ callsign genealogy
Currently held by Lawrence III, 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 WA9SDJ's current licensee, walking backwards.
- Lawrence III, John AINgranted 2007-05-18cancelled 2007-06-05
Successor callsigns
Callsigns held now by people who previously held WA9SDJ.
No current licensee on record previously held this callsign.