Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W5MZH callsign genealogy
Currently held by KING, SYLVIA A
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 W5MZH's current licensee, walking backwards.
- KING, SYLVIA AMSgranted 2005-03-05cancelled 2013-09-06
Successor callsigns
Callsigns held now by people who previously held W5MZH.
- GUNDERSON, JOHN ACOgranted 2006-06-20cancelled 2018-09-13