Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WD7ADR callsign genealogy
Currently held by Sigrist, Donald 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 WD7ADR's current licensee, walking backwards.
- Sigrist, Donald AAZgranted 2004-01-12cancelled 2004-01-30
Successor callsigns
Callsigns held now by people who previously held WD7ADR.
- Sigrist, Donald AAZgranted 2024-11-13