Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4ZUP callsign genealogy
Currently held by KING, HOWARD G
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 W4ZUP's current licensee, walking backwards.
- BRACKIN, MICHAEL RALgranted 1995-08-14cancelled 2000-03-17
Successor callsigns
Callsigns held now by people who previously held W4ZUP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4ZUP, oldest first.
- KING, HOWARD G AL1997-11-17 → cancelled 1998-07-31
- BRACKIN, MICHAEL R AL2020-01-07 active