Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K6MSW callsign genealogy
Currently held by Welch, Mark 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 K6MSW's current licensee, walking backwards.
- Welch, Mark SMIgranted 2012-03-02cancelled 2012-05-30
Successor callsigns
Callsigns held now by people who previously held K6MSW.
- Welch, Mark SMIgranted 2017-06-09