Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W5SDB callsign genealogy
Currently held by DARNELL, CLAYTON A
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 W5SDB's current licensee, walking backwards.
- DARNELL, CLAYTON AOKgranted 2019-10-10cancelled 2019-10-29
Successor callsigns
Callsigns held now by people who previously held W5SDB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W5SDB, oldest first.
- GERMANN, WALTER G TX1991-05-07 → cancelled 2003-05-08
- DARNELL, CLAYTON A OK2019-10-29 active