Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4KKO callsign genealogy
Currently held by BYARS, ISAAC D
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 W4KKO's current licensee, walking backwards.
- White, BrianORgranted 2013-10-24cancelled 2013-11-13
Successor callsigns
Callsigns held now by people who previously held W4KKO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4KKO, oldest first.
- BYARS, ISAAC D TN1998-01-16 → cancelled 2010-01-20
- White, Brian D OR2023-11-03 active