Confidence: Medium · Source: FCC ULS · As of 2026-09-14
NW6O callsign genealogy
Currently held by HAT IN HAND CONTEST CLUB
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 NW6O's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held NW6O.
All historical holders
Every license row we've seen with the callsign NW6O, oldest first.
- HAT IN HAND CONTEST CLUB CA2007-04-24 → cancelled 2011-10-12
- SMERDON, WILLIAM S CA2024-01-10 active
- MAURO, HENRY F— → cancelled 1998-11-18