Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N8EFB callsign genealogy
Currently held by SCHWERTFAGER, WILLIAM 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 N8EFB's current licensee, walking backwards.
- SCHWERTFAGER, WILLIAM EOHgranted 2017-02-07cancelled 2021-11-27
Successor callsigns
Callsigns held now by people who previously held N8EFB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N8EFB, oldest first.
- Schwertfager, David W OH2007-06-25 → cancelled 2019-09-19
- SCHWERTFAGER, WILLIAM E OH2021-11-27 active