Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AE4SG callsign genealogy
Currently held by GUERCIO, JOHN S
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 AE4SG's current licensee, walking backwards.
- GUERCIO, JOHN SMDgranted 2019-10-01cancelled 2024-10-19
Successor callsigns
Callsigns held now by people who previously held AE4SG.
- Vaughn, PattyOHgranted 1997-05-09cancelled 2004-01-31
All historical holders
Every license row we've seen with the callsign AE4SG, oldest first.
- Vaughn, Patty OH1997-05-09 → cancelled 2001-04-30
- GUERCIO, JOHN S MD2024-10-19 active