Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KN8S callsign genealogy
Currently held by SULLIVAN, 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 KN8S's current licensee, walking backwards.
- Grosse, Marc CFLgranted 2023-10-17cancelled 2025-01-04
Successor callsigns
Callsigns held now by people who previously held KN8S.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KN8S, oldest first.
- SULLIVAN, JOHN A MI2012-09-17 → cancelled 2024-12-17
- Grosse, Marc FL2025-01-04 active