Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WD4ALL callsign genealogy
Currently held by Himmel, William D
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 WD4ALL's current licensee, walking backwards.
- Himmel, William DFLgranted 2016-06-01cancelled 2018-10-16
Successor callsigns
Callsigns held now by people who previously held WD4ALL.
- WELLS MD, MICHAEL AALgranted 2020-07-15
All historical holders
Every license row we've seen with the callsign WD4ALL, oldest first.
- WELLS MD, MICHAEL A AL2010-08-05 → cancelled 2010-09-17
- Himmel, William D FL2018-10-16 active