Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4FRH callsign genealogy
Currently held by Hof, Frank R
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 K4FRH's current licensee, walking backwards.
- Thomas, Deborah MFLgranted 2014-02-22cancelled 2023-05-12
Successor callsigns
Callsigns held now by people who previously held K4FRH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4FRH, oldest first.
- Hof, Frank R FL2011-04-22 → cancelled 2023-04-25
- Thomas, Deborah M FL2023-05-12 active