Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4SU callsign genealogy
Currently held by Cass, Nathan 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 K4SU's current licensee, walking backwards.
- Cass Sr, Nathan AVAgranted 2000-06-21cancelled 2006-03-14
Successor callsigns
Callsigns held now by people who previously held K4SU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4SU, oldest first.
- GALLANT, STEVEN H VA1994-02-22 → cancelled 2006-02-23
- Cass, Nathan A VA2026-01-24 active