Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W0RWH callsign genealogy
Currently held by SINNOCK, DONALD J
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 W0RWH's current licensee, walking backwards.
- HARPER, RICHARD WNEgranted 2013-08-20cancelled 2016-08-09
Successor callsigns
Callsigns held now by people who previously held W0RWH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W0RWH, oldest first.
- SINNOCK, DONALD J MO1994-04-05 → cancelled 2006-04-06
- HARPER, RICHARD W NE2016-08-09 active