Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N5QDL callsign genealogy
Currently held by KOCH JR, JOHN A
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 N5QDL's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held N5QDL.
- KOCH JR, JOHN AARgranted 2023-02-01
All historical holders
Every license row we've seen with the callsign N5QDL, oldest first.
- KOCH, JOHN A AR1990-03-20 → cancelled 2002-03-21
- KOCH JR, JOHN A AR2023-02-01 → cancelled 2023-03-09