Our neighbors across the highway, just adopted a female kitten. She is friendly too. They have another hanging around that they haven't been able to get too close to. I'm betting they are all from the same litter, and we're dumped. People are just so callous.The vet should be able to give you some idea of his age. They could check too if he has a chip. Maybe he's just lost?
That could be a lot to hope for, just judging by all the dumped cats we used to get in the country in WY.