Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KF4LFD callsign genealogy
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 KF4LFD's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KF4LFD.
- MONROE, THOMAS JNEgranted 2018-01-12cancelled 2022-02-04
All historical holders
Every license row we've seen with the callsign KF4LFD, oldest first.
- MONROE, THOMAS J NE2008-03-01 → cancelled 2011-08-16
- —— → cancelled 1999-04-13