Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W2SF callsign genealogy
Currently held by STEWART JR, ROBERT 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 W2SF's current licensee, walking backwards.
- Kautz IV, Frederick FCAgranted 2016-08-24cancelled 2018-07-20
Successor callsigns
Callsigns held now by people who previously held W2SF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W2SF, oldest first.
- STEWART JR, ROBERT E NY2006-08-16 → cancelled 2016-06-30
- Kautz IV, Frederick F CA2018-07-20 active