Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB5FMH callsign genealogy
Currently held by Heerema, Fredric M
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 KB5FMH's current licensee, walking backwards.
- Heerema, Fredric MTXgranted 2024-06-27cancelled 2024-08-09
Successor callsigns
Callsigns held now by people who previously held KB5FMH.
- CAMPBELL, ROBERT MTXgranted 2018-12-18
All historical holders
Every license row we've seen with the callsign KB5FMH, oldest first.
- Heerema, Fredric M IA2024-08-09 active
- CAMPBELL, ROBERT M— → cancelled 1999-01-07