Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4VMS callsign genealogy
Currently held by DU HART SR, WILLIAM J
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 W4VMS's current licensee, walking backwards.
- Swab, MicahIAgranted 2026-07-09cancelled 2026-07-31
Successor callsigns
Callsigns held now by people who previously held W4VMS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4VMS, oldest first.
- DU HART SR, WILLIAM J FL1996-04-10 → cancelled 2008-04-11
- Swab, Micah IA2026-07-31 active