Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K0BBK callsign genealogy
Currently held by TRESSELL, WILLIAM M
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 K0BBK's current licensee, walking backwards.
- Tressell, William MNMgranted 2004-03-09cancelled 2007-08-17
Successor callsigns
Callsigns held now by people who previously held K0BBK.
No current licensee on record previously held this callsign.