Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KT4YK callsign genealogy
Currently held by SMITH, F BRIAN
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 KT4YK's current licensee, walking backwards.
- Smith, F BrianCOgranted 2018-09-04cancelled 2018-09-25
Successor callsigns
Callsigns held now by people who previously held KT4YK.
- Smith, F BrianCOgranted 2019-03-15cancelled 2022-07-29
All historical holders
Every license row we've seen with the callsign KT4YK, oldest first.
- SMITH, F BRIAN CO2005-08-25 → cancelled 2017-08-26
- Smith, F Brian CO2018-09-25 → cancelled 2019-03-15