Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WZ4K callsign genealogy
Currently held by Ryan, Donald P
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 WZ4K's current licensee, walking backwards.
- WAXMAN, HOWARD AVAgranted 2014-02-04cancelled 2016-04-05
Successor callsigns
Callsigns held now by people who previously held WZ4K.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WZ4K, oldest first.
- Ryan, Donald P VA2004-01-27 → cancelled 2016-03-16
- WAXMAN, HOWARD A VA2026-01-21 active