Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1SEM callsign genealogy
Currently held by Sandwich Emergency Management Club
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 W1SEM's current licensee, walking backwards.
- KB1WBFcancelledSandwich Emergency Management ClubMAgranted 2011-09-09cancelled 2011-10-07
Successor callsigns
Callsigns held now by people who previously held W1SEM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1SEM, oldest first.
- ALLISON, JAMES D MA1999-04-19 → cancelled 2010-04-23
- Sandwich Emergency Management Club MA2021-08-02 active