Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KI0S callsign genealogy
Currently held by WILLIS, HARVEY 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 KI0S's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KI0S.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KI0S, oldest first.
- WILLIS, HARVEY A OR2013-07-31 → cancelled 2025-09-03
- LANARI, CHRISTOPHER L MN2025-12-09 active