I got this information from The Netflix ID Bible – Every Category on Netflix » What’s On Netflix?, but I had to fix it so that there are actual links rather than just codes.

Action-and-adventure

Anime

Children-and-family

Classic-movies-id-netflix

Comedies-id-netflix

Documentaries

Drama

International Movies

Horror-movies-netflix

Musicals

Romance

Sci-fi-and-fantasy

Sports

Thrillers