Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K6DAY callsign genealogy
Currently held by Day, Thomas E
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 K6DAY's current licensee, walking backwards.
- Simpson, Michael SCAgranted 2020-03-13cancelled 2024-02-17
Successor callsigns
Callsigns held now by people who previously held K6DAY.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K6DAY, oldest first.
- Day, Thomas E CA2011-05-28 → cancelled 2023-08-18
- Simpson, Michael S CA2024-02-17 active