Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W3CDU callsign genealogy
Currently held by GRILLI, VIRGIL 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 W3CDU's current licensee, walking backwards.
- GRILLI, CHRISTOPHER VPAgranted 2000-07-08cancelled 2002-09-17
Successor callsigns
Callsigns held now by people who previously held W3CDU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W3CDU, oldest first.
- GRILLI, VIRGIL A PA1992-04-07 → cancelled 2001-07-22
- GRILLI, CHRISTOPHER V PA2022-08-05 active