Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W7TDB callsign genealogy
Currently held by GRABNER 861, DEVIN S
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 W7TDB's current licensee, walking backwards.
- Grabner, Devin SORgranted 2020-10-29cancelled 2021-12-07
Successor callsigns
Callsigns held now by people who previously held W7TDB.
No current licensee on record previously held this callsign.