Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9AJP callsign genealogy
Currently held by RILEY, ROBERT 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 K9AJP's current licensee, walking backwards.
- DeWitz Jr, Harold DMNgranted 2020-02-10cancelled 2020-12-04
Successor callsigns
Callsigns held now by people who previously held K9AJP.
- RILEY, ROBERT WINgranted 1997-11-25cancelled 1999-10-28
All historical holders
Every license row we've seen with the callsign K9AJP, oldest first.
- DeWitz Jr, Harold D MN2020-12-04 active
- RILEY, ROBERT W— → cancelled 1997-11-25