Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W3BUX callsign genealogy
Currently held by Castelli, Robert M
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 W3BUX's current licensee, walking backwards.
- Castelli, Robert MPAgranted 2021-07-01cancelled 2021-07-20
Successor callsigns
Callsigns held now by people who previously held W3BUX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W3BUX, oldest first.
- HAMMONDS, E FOSTER PA1995-01-23 → cancelled 2007-01-24
- Castelli, Robert M PA2021-07-20 active