Confidence: Medium · Source: FCC ULS · As of 2026-09-14
NI9X callsign genealogy
Currently held by Carlson, William E
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 NI9X's current licensee, walking backwards.
- Carlson, William EWIgranted 2015-12-25cancelled 2017-12-22
Successor callsigns
Callsigns held now by people who previously held NI9X.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NI9X, oldest first.
- REID, PHILIP C WI2005-09-22 → cancelled 2017-11-29
- Carlson, William E WI2017-12-22 active