Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KT4SH callsign genealogy
Currently held by KIRBY, FRANCIS X
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 KT4SH's current licensee, walking backwards.
- KQ4PHQcancelledSPRING HILL AMATEUR RADIO CLUBTNgranted 2024-03-02cancelled 2025-12-23
Successor callsigns
Callsigns held now by people who previously held KT4SH.
- KIRBY, FRANCIS XTNgranted 2023-04-29
All historical holders
Every license row we've seen with the callsign KT4SH, oldest first.
- KIRBY, FRANCIS X TN2015-05-08 → cancelled 2023-04-29
- SPRING HILL AMATEUR RADIO CLUB TN2025-12-23 active