Older Black Male cat, not neutered, very friendly, Dublin 15

Huntstown Road - male black cat with very small white patch under chin.Un-neutered, older, definitely not less than 2 years old. Quite tattered ears and a small scar across his nose. Very very friendly and desperate to be allowed indoors and petted. He's a lovely boy and I think someone must be missing him, possibly for a few weeks, as a neighbour has been feeding him for a while. We had to let him back out last night but I'm hoping he'll come back today to be fed and if so, we'll take him to the vets to get checked for a chip, but I'm guessing since he's not neutered, he's probably not chipped. We really can't keep him, we have 3 already. Please share - someone *must* be missing him