Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB0YCX callsign genealogy
Currently held by BIRKENHOLTZ, TODD A
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 KB0YCX's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KB0YCX.
- BIRKENHOLTZ, TODD AIAgranted 2025-06-17