Check to see if he has a chip - chipd csn migrste so please scan the whole body. Vets will do it for free. Check with local police and vets. Thanks for helping this dear pet. Post him on Pawboost.
Have you contacted Conshy SPCA and local Rescues and filed Found Cat report? They may already have a Lost Cat report on file. Also checking lost posts helps. Thanks for your kindness and help w kitty.