Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N6TCY callsign genealogy
Currently held by TOLLEFSRUD, HARRY O
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 N6TCY's current licensee, walking backwards.
- KG6ZEXcancelledTRACY AMATEUR RADIO CLUBCAgranted 2005-05-03cancelled 2005-05-28
Successor callsigns
Callsigns held now by people who previously held N6TCY.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N6TCY, oldest first.
- TOLLEFSRUD, HARRY O CA1990-10-09 → cancelled 2002-10-10
- TRACY AMATEUR RADIO CLUB CA2017-03-09 active