Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1NNZ callsign genealogy
Currently held by Kosche III, William A
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 W1NNZ's current licensee, walking backwards.
- Kosche III, William ACTgranted 2018-11-13cancelled 2019-02-01
Successor callsigns
Callsigns held now by people who previously held W1NNZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1NNZ, oldest first.
- KOSCHE, WILLIAM A CT1988-07-26 → cancelled 2000-07-27
- Kosche III, William A CT2019-02-01 active