Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W9OQN callsign genealogy
Currently held by DENNEWITZ, HOWARD W
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 W9OQN's current licensee, walking backwards.
- Denil, DerekWIgranted 2026-07-03cancelled 2026-09-05
Successor callsigns
Callsigns held now by people who previously held W9OQN.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9OQN, oldest first.
- DENNEWITZ, HOWARD W FL1998-02-25 → cancelled 2010-02-26
- Denil, Derek WI2026-09-05 active