Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4BYU callsign genealogy
Currently held by HANRAHAN, CATHY L
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 K4BYU's current licensee, walking backwards.
- Bean, Eric AKSgranted 2023-03-03cancelled 2023-05-19
Successor callsigns
Callsigns held now by people who previously held K4BYU.
- REED, JAMES WALgranted 2021-04-27cancelled 2023-06-22
All historical holders
Every license row we've seen with the callsign K4BYU, oldest first.
- HANRAHAN, CATHY L GA2008-02-01 → cancelled 2020-03-04
- REED, JAMES W AL2021-04-06 → cancelled 2021-04-27
- Bean, Eric A KS2023-05-19 active