Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4SOB callsign genealogy
Currently held by BIRD, DAVID 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 KO4SOB's current licensee, walking backwards.
- BIRD, DAVID BTNgranted 2021-04-26cancelled 2021-06-29
Successor callsigns
Callsigns held now by people who previously held KO4SOB.
No current licensee on record previously held this callsign.