Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4BAC callsign genealogy
Currently held by FERNANDEZ, SEBASTIAN
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 K4BAC's current licensee, walking backwards.
- FERNANDEZ, SEBASTIANFLgranted 2002-11-01cancelled 2010-06-02
Successor callsigns
Callsigns held now by people who previously held K4BAC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4BAC, oldest first.
- SPAFFORD, RALPH B AL1998-05-11 → cancelled 2010-05-12
- FERNANDEZ, SEBASTIAN FL2020-07-06 active