Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WA4DHD callsign genealogy
Currently held by BLACKWOOD, ROBERT W
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 WA4DHD's current licensee, walking backwards.
- BLACKWOOD, ROBERT WSCgranted 2017-07-05cancelled 2018-03-16
Successor callsigns
Callsigns held now by people who previously held WA4DHD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WA4DHD, oldest first.
- NEW, JAMES R GA1997-02-04 → cancelled 2009-02-05
- BLACKWOOD, ROBERT W SC2018-03-16 active