Cut the widest end of an earn of corn off so that you have a flat surface. Then, place the cut end on a cutting board vertically. Using a sharp knife, cut the corn in half downwards into two long pieces. Then, cut each longer piece in half so you have 4 long strips. Repeat this process with the remaining ears of corn.
In a small bowl, whisk the olive oil, salt, garlic powder, chili powder and smoked paprika. Brush the corn with this mixture.
Arrange the corn strips in the basket of the air fryer. They can be close together as long as they are not touching.
Air fry for 6 minutes. Flip, and cook for an additional 6 minutes.
Make the dipping sauce: In a small bowl, combine the mayonnaise, sour cream, lime juice and chili powder. Serve with warm corn ribs.