Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4DER callsign genealogy
Currently held by BETZER Mr, GUSTAVO E
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 N4DER's current licensee, walking backwards.
- Ryan Sr, Darrell ETNgranted 2013-11-12cancelled 2021-11-20
Successor callsigns
Callsigns held now by people who previously held N4DER.
- BETZER Mr, GUSTAVO EFLgranted 2018-11-09
All historical holders
Every license row we've seen with the callsign N4DER, oldest first.
- Gilliland, Charles W AL2005-04-18 → cancelled 2017-05-04
- BETZER Mr, GUSTAVO E FL2017-05-23 → cancelled 2018-11-09
- Ryan Sr, Darrell E TN2021-11-20 active