Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1CSI callsign genealogy
Currently held by CODEM RADIO AMATEUR 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 W1CSI's current licensee, walking backwards.
- Crump, James KMAgranted 2013-05-03cancelled 2013-05-24
Successor callsigns
Callsigns held now by people who previously held W1CSI.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1CSI, oldest first.
- CODEM RADIO AMATEUR CLUB NH1998-01-14 → cancelled 2006-07-27
- Crump, James K MA2023-04-27 active