Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4SBF callsign genealogy
Currently held by RAPER, ROBERT L
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 W4SBF's current licensee, walking backwards.
- OAKLEY, JAMES LTNgranted 2014-01-02cancelled 2021-08-27
- KQ4FZno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held W4SBF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4SBF, oldest first.
- RAPER, ROBERT L TN1995-06-14 → cancelled 2007-06-15
- OAKLEY, JAMES L TN2021-08-27 active