Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4VOX callsign genealogy
Currently held by SULLIVAN, MARK B
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 W4VOX's current licensee, walking backwards.
- SULLIVAN, MARK BNCgranted 1998-04-01cancelled 2006-09-12
Successor callsigns
Callsigns held now by people who previously held W4VOX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4VOX, oldest first.
- WARD SR, CARL D NC1997-01-28 → cancelled 2003-10-09
- SULLIVAN, MARK B NC2016-07-27 active