Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N3JKW callsign genealogy
Currently held by Hupfer, John
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 N3JKW's current licensee, walking backwards.
- Hupfer, JohnMDgranted 2024-12-17cancelled 2025-01-04
Successor callsigns
Callsigns held now by people who previously held N3JKW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N3JKW, oldest first.
- Hupfer, John P MD2012-11-01 → cancelled 2024-09-18
- Hupfer, John MD2025-01-04 active