Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4SMO callsign genealogy
Currently held by Oi, Stephen 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 K4SMO's current licensee, walking backwards.
- OI, STEPHEN Mcancelled 1999-01-07
Successor callsigns
Callsigns held now by people who previously held K4SMO.
- Oi, Stephen MWAgranted 2021-07-27