Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W6ECU callsign genealogy
Currently held by Marin Amateur Emergency Communications Unit
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 W6ECU's current licensee, walking backwards.
- KN6OWHcancelledMarin Amateur Emergency Communications UnitCAgranted 2021-05-14cancelled 2021-06-04
Successor callsigns
Callsigns held now by people who previously held W6ECU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W6ECU, oldest first.
- SHRADER, DOROTHY F CA2005-03-05 → cancelled 2017-04-14
- Marin Amateur Emergency Communications Unit CA2021-06-04 active