Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K6RTA callsign genealogy
Currently held by WIECHMAN, CLEM D
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 K6RTA's current licensee, walking backwards.
- OBrien, Christopher ECAgranted 2022-07-15cancelled 2026-07-28
- OBrien, Christopher ECAgranted 2018-10-05cancelled 2022-07-15
- OBrien, Christopher ECAgranted 2018-08-07cancelled 2018-10-05
- OBrien, Christopher ECAgranted 2018-07-19cancelled 2018-08-07
Successor callsigns
Callsigns held now by people who previously held K6RTA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K6RTA, oldest first.
- WIECHMAN, CLEM D CA2005-11-03 → cancelled 2018-02-01
- OBrien, Christopher E CA2026-07-28 active