Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WA5TBK callsign genealogy
Currently held by Hoeft, Lothar O
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 WA5TBK's current licensee, walking backwards.
- Hoeft, MarkCAgranted 2025-06-21cancelled 2026-04-28
Successor callsigns
Callsigns held now by people who previously held WA5TBK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WA5TBK, oldest first.
- Hoeft, Lothar O NM2007-04-05 → cancelled 2019-06-07
- Hoeft, Mark CA2026-04-28 active