Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ7LH callsign genealogy
Currently held by Tysoe, John M
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 KJ7LH's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KJ7LH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KJ7LH, oldest first.
- Tysoe, John M AZ2004-06-18 → cancelled 2013-04-29
- Madson, Robert OR2025-04-01 active