Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1CMS callsign genealogy
Currently held by MATTHEWS III, JOHN F
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 W1CMS's current licensee, walking backwards.
- KC1PNGcancelledClaremont MakerSpace Amateur Radio ClubNHgranted 2021-06-29cancelled 2021-07-20
Successor callsigns
Callsigns held now by people who previously held W1CMS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1CMS, oldest first.
- MATTHEWS III, JOHN F VA2009-03-11 → cancelled 2021-03-12
- Claremont MakerSpace Amateur Radio Club NH2021-07-20 active