Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W3UBQ callsign genealogy
Currently held by Muller, Karl H
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 W3UBQ's current licensee, walking backwards.
- Muller, Karl FVAgranted 2019-05-16cancelled 2019-06-04
Successor callsigns
Callsigns held now by people who previously held W3UBQ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W3UBQ, oldest first.
- Muller, Karl H FL1998-04-03 → cancelled 2010-04-06
- Muller, Karl F VA2019-06-04 active