Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4YNI callsign genealogy
Currently held by RICHARDSON, 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 K4YNI's current licensee, walking backwards.
- SELKEN, ROBERT DFLgranted 2006-04-14cancelled 2006-11-14
Successor callsigns
Callsigns held now by people who previously held K4YNI.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4YNI, oldest first.
- RICHARDSON, WILLIAM J FL1989-05-16 → cancelled 2001-05-17
- SELKEN, ROBERT D FL2016-09-02 active