Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W7MSC callsign genealogy
Currently held by Carlsen, 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 W7MSC's current licensee, walking backwards.
- Carlsen, Mark SAZgranted 2009-05-26cancelled 2010-05-14
Successor callsigns
Callsigns held now by people who previously held W7MSC.
No current licensee on record previously held this callsign.