Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K0SBM callsign genealogy
Currently held by Masten, Stephen 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 K0SBM's current licensee, walking backwards.
- Masten, Stephen BMNgranted 2009-05-11cancelled 2010-11-20
Successor callsigns
Callsigns held now by people who previously held K0SBM.
No current licensee on record previously held this callsign.