Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W3TRW callsign genealogy
Currently held by SHAFFER, ROBERT A
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 W3TRW's current licensee, walking backwards.
- Shaffer Jr, Robert APAgranted 2000-04-08cancelled 2007-02-13
Successor callsigns
Callsigns held now by people who previously held W3TRW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W3TRW, oldest first.
- SHAFFER, ROBERT A MD1995-11-28 → cancelled 1997-02-13
- SHAFFER JR, ROBERT A PA2016-12-15 active