Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD0OSL callsign genealogy
Currently held by KIRMUSS, CHARLES 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 KD0OSL'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 KD0OSL.
- KIRMUSS, CHARLES BCOgranted 2023-03-14