Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AD5BU callsign genealogy
Currently held by CONNER, QUENTIN 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 AD5BU's current licensee, walking backwards.
- Underwood, William DOKgranted 2005-08-08cancelled 2012-09-14
Successor callsigns
Callsigns held now by people who previously held AD5BU.
- CONNER, QUENTIN ATXgranted 2021-03-30
All historical holders
Every license row we've seen with the callsign AD5BU, oldest first.
- CONNER, QUENTIN A TX1996-08-23 → cancelled 2001-06-19
- Underwood, William D OK2022-09-13 active