Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WA9TT callsign genealogy
Currently held by PETERSON, LARRY 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 WA9TT's current licensee, walking backwards.
- PETERSON, LARRY RWIgranted 2007-08-23cancelled 2016-11-15
Successor callsigns
Callsigns held now by people who previously held WA9TT.
- THEIRING, THOMAS MFLgranted 2024-07-09
All historical holders
Every license row we've seen with the callsign WA9TT, oldest first.
- THEIRING, THOMAS M FL2014-01-22 → cancelled 2014-09-06
- PETERSON, LARRY R WI2016-11-15 active