Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4FHK callsign genealogy
Currently held by Knobbe, Frank 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 K4FHK's current licensee, walking backwards.
- Knobbe, Frank HTNgranted 2013-05-17cancelled 2013-06-04
Successor callsigns
Callsigns held now by people who previously held K4FHK.
- LINDSLEY, THOMAS FVAgranted 2013-12-17cancelled 2026-03-13
All historical holders
Every license row we've seen with the callsign K4FHK, oldest first.
- LINDSLEY, THOMAS F VA1996-08-14 → cancelled 2004-03-12
- Knobbe, Frank H TN2023-05-06 active