Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AF4JQ callsign genealogy
Currently held by JOHN, KONRAD P
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 AF4JQ's current licensee, walking backwards.
- Quaderer, JohnVAgranted 2023-03-21cancelled 2023-10-31
Successor callsigns
Callsigns held now by people who previously held AF4JQ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AF4JQ, oldest first.
- JOHN, KONRAD P FL1998-05-05 → cancelled 2009-06-30
- Quaderer, John VA2023-10-31 active