Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4SFL callsign genealogy
Currently held by South Florida Digital Group
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 N4SFL's current licensee, walking backwards.
- KR4DLNcancelledSouth Florida Digital GroupFLgranted 2025-04-23cancelled 2025-07-08
Successor callsigns
Callsigns held now by people who previously held N4SFL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4SFL, oldest first.
- YARBROUGH, PATRICIA S NC2010-05-29 → cancelled 2022-06-01
- South Florida Digital Group FL2025-07-08 active