C642-51151 was a Borg tactical fusion cube ship of the collective in the 24th century. C642-51151 was in active service somewhere in the galaxy around the year 2377. (TNG video game: Armada II)

No history or fate is established for this vessel as its designation was randomly selected for a Borg cube by the game software.
Borg tactical fusion cubes
Borg C642-02132C642-04231C642-19218C642-20136C642-26554C642-31113C642-35216C642-36444C642-39866C642-46563C642-47555C642-51151C642-55884C642-62454C642-63313C642-63454C642-64546C642-64564C642-65344C642-65345C642-74746C642-74747C642-75839C642-83637C642-84899C642-84958C642-95877C642-98346C642-98376C642-98875 Borg