Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WD1ZER callsign genealogy
Currently held by Wanzer, Donald 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 WD1ZER's current licensee, walking backwards.
- Wanzer, Donald SOKgranted 2016-03-15cancelled 2016-04-05
Successor callsigns
Callsigns held now by people who previously held WD1ZER.
No current licensee on record previously held this callsign.