If the kitten was an indoor kitten, then chances are he has no clue how to get back to his home. Ask all the neighbors to help find him. Chances are someone may have picked him up also. If so, maybe they brought the kitten to a shelter or vet. Alert all the vet clinics and shelters in the area about him being lost. And call him, he may recognise voices he knows. Does he have any collar or tags to help identify him? Poor baby...hope you're in an area that is safe from cars and preditors. Try looking under bushes, porches and all the areas around the property. Maybe he's scared and hiding. Good luck & keep us posted.