Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W2MSW callsign genealogy
Currently held by WIATROSKI, 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 W2MSW's current licensee, walking backwards.
- WIATROSKI, MARK SNJgranted 2009-02-27cancelled 2016-02-17
Successor callsigns
Callsigns held now by people who previously held W2MSW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W2MSW, oldest first.
- HOUCK, CARL H FL1996-08-28 → cancelled 2008-08-29
- WIATROSKI, MARK S NJ2025-11-26 active