Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K3SMK callsign genealogy
Currently held by SPERANZA, SEBASTIAN R
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 K3SMK's current licensee, walking backwards.
- KJ5KWUcancelledCORAC AMATEUR RADIO CLUBTXgranted 2025-04-11cancelled 2025-05-02
Successor callsigns
Callsigns held now by people who previously held K3SMK.
- SPERANZA, SEBASTIAN RKYgranted 2018-11-20
All historical holders
Every license row we've seen with the callsign K3SMK, oldest first.
- CORAC AMATEUR RADIO CLUB TX2025-05-02 active
- SPERANZA, SEBASTIAN R— → cancelled 1999-02-10