Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4BYU callsign genealogy
Currently held by HANRAHAN, BRIAN R
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 W4BYU's current licensee, walking backwards.
- Ashby, William JGAgranted 2021-04-27cancelled 2021-05-18
Successor callsigns
Callsigns held now by people who previously held W4BYU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4BYU, oldest first.
- HANRAHAN, BRIAN R GA2008-07-11 → cancelled 2020-10-06
- Ashby, William J GA2021-05-18 active