Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K8ZW callsign genealogy
Currently held by FLOYD, MARK S
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 K8ZW's current licensee, walking backwards.
- VIELHABER JR, VINCENT EMIgranted 2013-04-29cancelled 2018-05-08
Successor callsigns
Callsigns held now by people who previously held K8ZW.
- FLOYD, MARK SCTgranted 2016-04-19cancelled 2016-05-27
All historical holders
Every license row we've seen with the callsign K8ZW, oldest first.
- FLOYD, MARK S OH2010-09-28 → cancelled 2016-04-19
- VIELHABER JR, VINCENT E MI2018-05-08 active