Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4BYK callsign genealogy
Currently held by HAEGER, JOHN R
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 W4BYK's current licensee, walking backwards.
- MACKLIN, SCOTT HSCgranted 2017-03-20cancelled 2018-03-27
Successor callsigns
Callsigns held now by people who previously held W4BYK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4BYK, oldest first.
- HAEGER, JOHN R FL1994-09-14 → cancelled 2006-09-15
- Macklin, Scott H SC2018-03-27 active