Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NF8Y callsign genealogy
Currently held by GRZYWINSKI, ZYGMUND H
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 NF8Y's current licensee, walking backwards.
- Haiden, KarlGAgranted 2020-07-23cancelled 2020-09-09
Successor callsigns
Callsigns held now by people who previously held NF8Y.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NF8Y, oldest first.
- GRZYWINSKI, ZYGMUND H MI2008-07-11 → cancelled 2020-08-06
- Haiden, Karl GA2020-09-09 active