Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4KSM callsign genealogy
Currently held by NIEHUESER, HANS H
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 N4KSM's current licensee, walking backwards.
- Mahr, Joshua RFLgranted 2018-04-16cancelled 2019-04-13
Successor callsigns
Callsigns held now by people who previously held N4KSM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4KSM, oldest first.
- NIEHUESER, HANS H FL2002-11-13 → cancelled 2014-11-14
- Mahr, Joshua R FL2019-04-13 active