Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K5YPY callsign genealogy
Currently held by BUTLER, BRIAN A
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 K5YPY's current licensee, walking backwards.
- BUTLER, BRIAN ATXgranted 2018-05-12cancelled 2024-03-26
Successor callsigns
Callsigns held now by people who previously held K5YPY.
- BUTLER, BRIAN ATXgranted 2018-05-12cancelled 2024-03-26
All historical holders
Every license row we've seen with the callsign K5YPY, oldest first.
- BUTLER, BRIAN A TX2015-10-20 → cancelled 2018-05-12
- BUTLER, BRIAN A TX2024-03-26 active