Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4RBT callsign genealogy
Currently held by Tadlock Jr, Ronald B
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 KO4RBT's current licensee, walking backwards.
- Tadlock Jr, Ronald BNCgranted 2020-11-05cancelled 2021-01-19
Successor callsigns
Callsigns held now by people who previously held KO4RBT.
No current licensee on record previously held this callsign.