Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1RPM callsign genealogy
Currently held by Chiu, Yu-jiunn
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 W1RPM's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W1RPM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1RPM, oldest first.
- DILLARD, EDWARD F MA1998-06-17 → cancelled 2010-06-18
- Chiu, Yu-jiunn OR2019-03-22 active