Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KF4WOL callsign genealogy
Currently held by MEWBORN, THOMAS J
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 KF4WOL's current licensee, walking backwards.
- Mewborn, Thomas JFLgranted 1998-03-24cancelled 2000-08-22
Successor callsigns
Callsigns held now by people who previously held KF4WOL.
- Mewborn, Thomas JFLgranted 1998-03-24cancelled 2000-08-22
All historical holders
Every license row we've seen with the callsign KF4WOL, oldest first.
- MEWBORN, THOMAS J FL1998-03-24 → cancelled 2000-05-26
- Mewborn, Thomas J FL2020-08-18 active