Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1TDR callsign genealogy
Currently held by Rasmussen, Tarrin
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 W1TDR's current licensee, walking backwards.
- Rasmussen, TarrinUTgranted 2016-07-13cancelled 2019-03-26
Successor callsigns
Callsigns held now by people who previously held W1TDR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1TDR, oldest first.
- HOLLOWAY, DAVID G NH2005-01-20 → cancelled 2017-04-20
- Rasmussen, Tarrin UT2019-03-26 active