Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4TSS callsign genealogy
Currently held by HOWARD, WILLIAM K
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 K4TSS's current licensee, walking backwards.
- HOWARD, WILLIAM KTNgranted 2024-04-02cancelled 2024-06-11
Successor callsigns
Callsigns held now by people who previously held K4TSS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4TSS, oldest first.
- Sullivan, Thomas S AL2010-05-11 → cancelled 2022-05-12
- HOWARD, WILLIAM K TN2024-06-11 active