Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KF4SR callsign genealogy
Currently held by Hobbie IV, Jason D
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 KF4SR's current licensee, walking backwards.
- Roberts, Stanley ATNgranted 2017-11-14cancelled 2025-05-09
Successor callsigns
Callsigns held now by people who previously held KF4SR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KF4SR, oldest first.
- Hobbie IV, Jason D VA2008-10-23 → cancelled 2020-10-24
- Roberts, Stanley A TN2025-05-09 active