Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4JKY callsign genealogy
Currently held by MARTIN SR, WILLIAM C
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 W4JKY's current licensee, walking backwards.
- Barno, Jeremy JKYgranted 2014-05-20cancelled 2015-12-22
Successor callsigns
Callsigns held now by people who previously held W4JKY.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4JKY, oldest first.
- MARTIN SR, WILLIAM C KY2000-08-18 → cancelled 2012-11-14
- Barno, Jeremy J KY2015-12-22 active