Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NK3N callsign genealogy
Currently held by GROGAN, WILLIAM 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 NK3N's current licensee, walking backwards.
- GROGAN, WILLIAM JNCgranted 2009-02-10cancelled 2011-06-07
Successor callsigns
Callsigns held now by people who previously held NK3N.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NK3N, oldest first.
- FOX, DAVID E WA1997-07-31 → cancelled 2009-08-01
- GROGAN, WILLIAM J NC2021-03-25 active