Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4KSD callsign genealogy
Currently held by Hammond, Griffin 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 N4KSD's current licensee, walking backwards.
- Hammond, Griffin JILgranted 2011-04-20cancelled 2021-02-06
Successor callsigns
Callsigns held now by people who previously held N4KSD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4KSD, oldest first.
- HAMMOND III, EUGENE W CA2005-03-22 → cancelled 2017-05-05
- Hammond, Griffin J IL2021-02-06 active