Sector V is a KND sector consisting of Numbuhs 1, 2, 3, 4 and 5. They live in a suburban area presumably in the United States, where their treehouse is also stationed. The members of Sector V are the main characters of the Codename: Kids Next Door series. They're good friends of Winnie the Pooh, especially Numbuh 1. They are also friends with Barney the Dinosaur and his backyard gang. Even though they're not members, they will still accompany them in future adventures.