Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9FWS callsign genealogy
Currently held by Seibold, Frederick W
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 W9FWS's current licensee, walking backwards.
- Seibold, Frederick WILgranted 2000-04-29cancelled 2000-05-20
Successor callsigns
Callsigns held now by people who previously held W9FWS.
No current licensee on record previously held this callsign.