Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W6LDO callsign genealogy
Currently held by RUNNING, CHRISTOPHER E
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 W6LDO's current licensee, walking backwards.
- Rizzi Carlson, OliverCAgranted 2019-12-23cancelled 2024-03-05
Successor callsigns
Callsigns held now by people who previously held W6LDO.
- RUNNING, CHRISTOPHER EUTgranted 2016-12-30
All historical holders
Every license row we've seen with the callsign W6LDO, oldest first.
- DROZDIAK, WALTER M CA1988-03-08 → cancelled 2000-03-09
- RUNNING, CHRISTOPHER E UT2016-07-16 → cancelled 2016-12-30
- Rizzi Carlson, Oliver CA2024-03-05 active