Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NX7O callsign genealogy
Currently held by Holzwarth, Benton J
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 NX7O's current licensee, walking backwards.
- Holzwarth, Benton JORgranted 2011-06-20cancelled 2018-08-03
Successor callsigns
Callsigns held now by people who previously held NX7O.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NX7O, oldest first.
- CHAMBERS, KENNETH E OR2006-06-13 → cancelled 2018-07-17
- Holzwarth, Benton J OR2018-08-03 active