Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W0WSD callsign genealogy
Currently held by Former South Dakota Amateur Radio Operators Association
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 W0WSD's current licensee, walking backwards.
- Denkins, William SMOgranted 2021-03-18cancelled 2021-04-10
Successor callsigns
Callsigns held now by people who previously held W0WSD.
- NQ0SDcancelledFormer South Dakota Amateur Radio Operators AssociationTNgranted 2011-03-12cancelled 2018-08-28
All historical holders
Every license row we've seen with the callsign W0WSD, oldest first.
- Former South Dakota Amateur Radio Operators Association TN2007-12-28 → cancelled 2011-03-12
- Denkins, William S MO2021-04-10 active