Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4MUD callsign genealogy
Currently held by ANDERSON JR, THOMAS U
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 W4MUD's current licensee, walking backwards.
- Andrews, Brian STNgranted 2013-05-17cancelled 2021-05-14
Successor callsigns
Callsigns held now by people who previously held W4MUD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4MUD, oldest first.
- ANDERSON JR, THOMAS U TX2006-01-05 → cancelled 2018-03-29
- Andrews, Brian S TN2021-05-14 active