The CW Operators Club (CWops) has formed 15 mini-clubs that correspond to the ARRL Divisions. Each mini-club has obtained a club license and a vanity callsign with a suffix of CWO or CWT for use in special events, contests, or other operating activities. These mini-clubs also provide a focal point for CWops members within each ARRL Division.

A mini-club vanity callsign is available for use by a U.S. amateur who (1) has a current, valid FCC license and (2) is a CWops member in good standing. Permission to use a club vanity callsign may be requested by clicking on the desired call sign below to create a request form. The request form will be sent to the manager for the call for review and response.

Each amateur who has been granted permission to use the club callsign agrees to submit a log of the operations using the club callsign, in ADIF Format, upon completion of the time period for which usage is granted, by following the Submit Log link for the call used below.