Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K3HHI callsign genealogy
Currently held by Schreffler, Douglas C
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 K3HHI's current licensee, walking backwards.
- SCHREFFLER, DOUGLAS CPAgranted 2016-04-20cancelled 2016-08-12
Successor callsigns
Callsigns held now by people who previously held K3HHI.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K3HHI, oldest first.
- FLEMING, OLEN S PA1998-10-02 → cancelled 2010-10-05
- Schreffler, Douglas C SC2026-07-11 active