Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W0THU callsign genealogy
Currently held by THU, RICHARD D
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 W0THU's current licensee, walking backwards.
- Thu, Richard DCOgranted 2001-09-13cancelled 2007-09-22
Successor callsigns
Callsigns held now by people who previously held W0THU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W0THU, oldest first.
- Sampson, Charles W IA1996-06-12 → cancelled 2005-02-16
- THU, RICHARD D NV2017-06-26 active