Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W6ARP callsign genealogy
Currently held by O GRADY, JOHN S
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 W6ARP's current licensee, walking backwards.
- O Grady, John SCAgranted 2009-06-25cancelled 2010-05-04
Successor callsigns
Callsigns held now by people who previously held W6ARP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W6ARP, oldest first.
- WESTERN AMATEUR RADIO PIONEERS CA1997-11-19 → cancelled 2006-08-14
- O GRADY, JOHN S OR2020-03-05 active