Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4SIX callsign genealogy
Currently held by Brewer, Frederick M
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 W4SIX's current licensee, walking backwards.
- Brewer, Frederick MNCgranted 2007-05-22cancelled 2012-12-14
Successor callsigns
Callsigns held now by people who previously held W4SIX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4SIX, oldest first.
- SCOTT, WILLIAM S NC2008-12-06 → cancelled 2012-04-25
- Brewer, Frederick M NC2022-12-16 active