Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W6SDZ callsign genealogy
Currently held by DARNELL, SHANNON 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 W6SDZ's current licensee, walking backwards.
- DARNELL, SHANNON DCAgranted 2021-02-17cancelled 2021-07-02
Successor callsigns
Callsigns held now by people who previously held W6SDZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W6SDZ, oldest first.
- ALLEN JR, ALVIN E CA1996-02-05 → cancelled 2008-02-06
- DARNELL, SHANNON D CA2021-07-02 active