Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W9JKN callsign genealogy
Currently held by Niehaus Jr, James K
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 W9JKN's current licensee, walking backwards.
- Niehaus Jr, James KINgranted 2009-09-01cancelled 2010-05-04
Successor callsigns
Callsigns held now by people who previously held W9JKN.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9JKN, oldest first.
- GOLDSTEIN, FRANK CA1996-02-09 → cancelled 2008-02-12
- Niehaus Jr, James K IN2020-03-17 active