Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WD4O callsign genealogy
Currently held by WALDRON, DENNIS B
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 WD4O's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held WD4O.
No current licensee on record previously held this callsign.