Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WC6DX callsign genealogy
Currently held by COSTELLO, GUILLERMO 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 WC6DX's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held WC6DX.
No current licensee on record previously held this callsign.