Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4SFL callsign genealogy
Currently held by ARGE SR, ROBERT C
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 W4SFL's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W4SFL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4SFL, oldest first.
- ARGE SR, ROBERT C CA2006-06-27 → cancelled 2018-06-28
- Amateur Radio Assn Of Southwest Florida FL2019-12-24 active