Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4IVN callsign genealogy
Currently held by Sluder, Ivan C
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 K4IVN's current licensee, walking backwards.
- Sluder, Ivan ITNgranted 2001-02-27cancelled 2003-03-25
Successor callsigns
Callsigns held now by people who previously held K4IVN.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4IVN, oldest first.
- FERRARI, ALFRED FL1988-07-05 → cancelled 2000-07-06
- Sluder, Ivan C TN2023-01-13 active