Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KZ4H callsign genealogy
Currently held by GRASTY JR, FRED E
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 KZ4H's current licensee, walking backwards.
- GRASTY JR, FRED ENCgranted 2007-03-26cancelled 2011-04-01
Successor callsigns
Callsigns held now by people who previously held KZ4H.
- SIMS, JON WNVgranted 2016-10-18
All historical holders
Every license row we've seen with the callsign KZ4H, oldest first.
- SELLEW, BARRY A AL1999-02-26 → cancelled 2011-03-01
- GRASTY JR, FRED E NC2021-02-03 active