Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NK4D callsign genealogy
Currently held by HAYNES JR, 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 NK4D's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held NK4D.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NK4D, oldest first.
- HAYNES JR, WILLIAM A AL2009-05-09 → cancelled 2017-10-04
- Decker, Gerald J FL2019-10-25 active