Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9SUP callsign genealogy
Currently held by LEIDIG, RICHARD P
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 K9SUP's current licensee, walking backwards.
- Colby, Andrew ENMgranted 2024-08-13cancelled 2024-09-10
Successor callsigns
Callsigns held now by people who previously held K9SUP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9SUP, oldest first.
- LEIDIG, RICHARD P IL2003-12-09 → cancelled 2016-01-19
- Colby, Andrew E NM2024-09-10 active