National Geographic Channel is a cable and satellite television channel that features documentaries and non-fiction programs focused on science, nature, history, and culture. It is owned by The Walt Disney Company and reaches over 86 million households in the United States.
ITC Stone Sans II Com Condensed Semibold, which is a sans-serif font designed by Summer Stone, is most likely the font used for the National Geographic Channel logo. The font may have undergone minor modifications on certain letters. Additional information on this font can be found here.