Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC0UBX callsign genealogy
Currently held by Siems, David L
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 KC0UBX's current licensee, walking backwards.
- Siems, David LMOgranted 1995-05-25cancelled 2005-03-15
Successor callsigns
Callsigns held now by people who previously held KC0UBX.
No current licensee on record previously held this callsign.