Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9AP callsign genealogy
Currently held by VAUGHAN JR, CLAUDIUS 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 K9AP's current licensee, walking backwards.
- HESS, WALTERMIgranted 2007-12-14cancelled 2015-03-27
Successor callsigns
Callsigns held now by people who previously held K9AP.
- KONRAD, RICHARD JWIgranted 2020-11-23
All historical holders
Every license row we've seen with the callsign K9AP, oldest first.
- VAUGHAN JR, CLAUDIUS C WI1988-07-12 → cancelled 2000-07-13
- KONRAD, RICHARD J WI2000-08-25 → cancelled 2001-02-16
- CARY CONTESTERS IL2003-03-08 → cancelled 2015-03-10
- HESS, WALTER MI2025-02-06 active