Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0SUB callsign genealogy
Currently held by Smith, Michael S
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 K0SUB's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K0SUB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0SUB, oldest first.
- STOCKHO, WILLIAM L NM2000-02-15 → cancelled 2012-02-16
- Smith, Michael S NE2020-06-09 active