Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC7ABD callsign genealogy
Currently held by Ralstin, David W
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 KC7ABD's current licensee, walking backwards.
- Ralstin, David WORgranted 2016-07-13cancelled 2016-09-24
Successor callsigns
Callsigns held now by people who previously held KC7ABD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC7ABD, oldest first.
- RALSTIN, DAVID W OR1993-12-21 → cancelled 2005-12-22
- Ralstin, David W OR2016-09-24 active