Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WA4BLH callsign genealogy
Currently held by Trombly, Mark
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 WA4BLH's current licensee, walking backwards.
- Trombly, MarkFLgranted 2025-08-26cancelled 2026-02-07
Successor callsigns
Callsigns held now by people who previously held WA4BLH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WA4BLH, oldest first.
- ERICKSON, ROY R FL1997-10-16 → cancelled 2009-10-17
- Trombly, Mark FL2026-02-07 active