Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC7S callsign genealogy
Currently held by NICOLAI, HENRY T
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 KC7S's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KC7S.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC7S, oldest first.
- NICOLAI, HENRY T AZ2014-04-23 → cancelled 2026-07-15
- Rosen, Charles B WA2026-08-04 active