Confidence: Medium · Source: FCC ULS · As of 2026-09-14
NM6U callsign genealogy
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 NM6U's current licensee, walking backwards.
- ULARTE, MARIO PCAgranted 2001-08-24cancelled 2003-10-03
- WD6GCGno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held NM6U.
- NR6RcancelledSAN DIEGO CONTEST CLUBCAgranted 1997-11-25cancelled 2000-05-05
All historical holders
Every license row we've seen with the callsign NM6U, oldest first.
- ULARTE, MARIO P CA2023-09-26 active
- —— → cancelled 1997-11-25