Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KT4SW callsign genealogy
Currently held by SWENSON III, ROBERT F
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 KT4SW's current licensee, walking backwards.
- SWENSON III, ROBERT FGAgranted 2024-05-14cancelled 2024-07-06
Successor callsigns
Callsigns held now by people who previously held KT4SW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KT4SW, oldest first.
- SWENSON III, ROBERT F GA2024-07-06 active
- —— → cancelled 1997-08-07