Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W6SWY callsign genealogy
Currently held by SPARREVOHN, FREDERIC D R
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 W6SWY's current licensee, walking backwards.
- SPARREVOHN, RIC ECAgranted 2004-04-27cancelled 2013-06-04
Successor callsigns
Callsigns held now by people who previously held W6SWY.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W6SWY, oldest first.
- SPARREVOHN, FREDERIC D R CA2006-11-01 → cancelled 2013-03-28
- SPARREVOHN, RIC E CA2023-05-23 active