Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N0SDH callsign genealogy
Currently held by Haack, Steven D
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 N0SDH's current licensee, walking backwards.
- Haack, Steven DMNgranted 2020-08-26cancelled 2022-03-08
Successor callsigns
Callsigns held now by people who previously held N0SDH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N0SDH, oldest first.
- FANCHER, JEFFERY B IA2003-06-24 → cancelled 2015-06-25
- Haack, Steven D MN2022-03-08 active