Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD4YSJ callsign genealogy
Currently held by Lee, Andrew G
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 KD4YSJ's current licensee, walking backwards.
- Lee, Andrew GAZgranted 2019-06-20cancelled 2019-09-04
Successor callsigns
Callsigns held now by people who previously held KD4YSJ.
- Patterson Jr, George SAZgranted 1998-10-27cancelled 2001-04-13
All historical holders
Every license row we've seen with the callsign KD4YSJ, oldest first.
- Patterson Jr, George S AZ1998-10-27 → cancelled 2001-03-14
- Lee, Andrew G AZ2019-09-04 active