Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KT4NM callsign genealogy
Currently held by JANSSEN, JOHN H
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 KT4NM's current licensee, walking backwards.
- Janssen, John HFLgranted 1996-03-27cancelled 2001-06-19
Successor callsigns
Callsigns held now by people who previously held KT4NM.
- Janssen, John HFLgranted 1996-03-27cancelled 2001-06-19
All historical holders
Every license row we've seen with the callsign KT4NM, oldest first.
- JANSSEN, JOHN H FL1996-03-27 → cancelled 2000-05-11
- Janssen, John FL2011-03-23 → cancelled 2023-07-12