Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K5SF callsign genealogy
Currently held by HAMBRIGHT, JAMES W
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 K5SF's current licensee, walking backwards.
- Detweiler, Richard PTXgranted 1998-06-01cancelled 2004-01-10
Successor callsigns
Callsigns held now by people who previously held K5SF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K5SF, oldest first.
- HAMBRIGHT, JAMES W TX1998-11-19 → cancelled 2000-10-29
- Detweiler, Richard P TX2023-10-24 active