Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4SZG callsign genealogy
Currently held by Castles, Andrew L
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 W4SZG's current licensee, walking backwards.
- Castles, Andrew LNCgranted 2019-08-29cancelled 2019-09-21
Successor callsigns
Callsigns held now by people who previously held W4SZG.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4SZG, oldest first.
- CASTLES JR, RUFUS A SC1996-02-05 → cancelled 2008-02-06
- Castles, Andrew L AL2019-09-21 active