From Wikipedia:
Codename: Kids Next Door is an American animated television series created by Mr. Warburton for Cartoon Network and distributed by Warner Bros. Domestic Television. The series follows the adventures of a diverse group of five 10-year-old children who operate from a high-tech treehouse, fighting against adult and teen villains with advanced 2×4 technology. Using their code names (Numbuhs 1, 2, 3, 4, and 5), they are Sector V, part of a global organization called the Kids Next Door.
The logo uses the typeface Aura, designed by Ilan Ronen and released in 1998 by T-26. Aura is also used in Codename: Kids Next Door's episode openings and credit sequences. Within the show itself, Aura is used during sequences that showcase the 2×4 technology that the Kids Next Door use, and for in-universe computer interfaces.
Original font identification by Fontendou.