Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W0IKW callsign genealogy
Currently held by GROTHE, THOMAS B
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 W0IKW's current licensee, walking backwards.
- Grothe, James TSDgranted 2025-03-05cancelled 2026-02-10
Successor callsigns
Callsigns held now by people who previously held W0IKW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W0IKW, oldest first.
- GROTHE, THOMAS B ND1994-02-08 → cancelled 2006-02-09
- Grothe, James T SD2026-02-10 active