Confidence: Medium · Source: FCC ULS · As of 2026-09-14
NI0W callsign genealogy
Currently held by FOUR STATE AMATEUR RADIO CLUB
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 NI0W's current licensee, walking backwards.
- Holman, Gregory ECOgranted 2024-01-17cancelled 2025-04-29
Successor callsigns
Callsigns held now by people who previously held NI0W.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NI0W, oldest first.
- FOUR STATE AMATEUR RADIO CLUB MO2000-01-07 → cancelled 2012-01-10
- MICHALSKI, DAVID J MN2013-04-09 → cancelled 2025-04-10
- Holman, Gregory E CO2025-04-29 active