Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ9H callsign genealogy
Currently held by JOHNSON, ROY B
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 KJ9H's current licensee, walking backwards.
- Harp, John WILgranted 2008-04-08cancelled 2011-05-10
Successor callsigns
Callsigns held now by people who previously held KJ9H.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KJ9H, oldest first.
- JOHNSON, ROY B IL2006-04-18 → cancelled 2009-01-27
- Harp, John W IL2021-08-28 active