Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K6TDU callsign genealogy
Currently held by Cimmarusti, Nicholas
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 K6TDU's current licensee, walking backwards.
- Cimmarusti, NicholasCAgranted 2015-06-25cancelled 2015-07-28
Successor callsigns
Callsigns held now by people who previously held K6TDU.
No current licensee on record previously held this callsign.