Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1MSH callsign genealogy
Currently held by Holden, 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 W1MSH's current licensee, walking backwards.
- Holden, Mark SCTgranted 2009-04-29cancelled 2012-05-30
Successor callsigns
Callsigns held now by people who previously held W1MSH.
No current licensee on record previously held this callsign.