Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KU4OP callsign genealogy
Currently held by SCHANTZ, DOUGLAS D
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 KU4OP's current licensee, walking backwards.
- KB9IGDcancelledcancelled 1998-02-08
Successor callsigns
Callsigns held now by people who previously held KU4OP.
- Schantz, Douglas Darren DKYgranted 2005-10-17cancelled 2013-08-27