Until someone responds with rescue centre information, pls keep the baby warm, hydrated and fed so he doesn't starve and die. Is he eating and drinking on his own? If not you can feed him defrosted frozen peas and corns thawed under hot water to get them to normal temperature around 30-35 peas three times a day at this age. Peas have good moisture in it so he will be hydrated too.
This link will help you :
If you need to feed peas to a pigeon, hold the bird on your lap and against your body. This gives you more control. Reach from behind his head with one hand and grasp his beak on either side. Now use your free hand to open the beak, and put a pea in, then push it to the back of his throat and over his tongue. Let him close his beak and swallow. Then do another. It gets easier with practice, and the bird also gets more used to it, and won't fight as much. If you can't handle the bird, then use the sleeve cut off a t-shirt, slip it over his head and onto his body, with his head sticking out. This will stop him from being able to fight you so much. Just don't make it tight around his crop area. It helps if you have him facing your right side if you are right handed. Start with about 35 defrosted and warmed peas. Warm, not hot. Do that maybe 3 times a day, but let the crop empty between times.
Remember frozen defrosted peas/corns should be thawed under hot water to make them warm/normal from in and outside both. Never give hot/cold stuff to any bird.
This video link will help you further to understand the process on how to do it(tho this is not in lap but you can get an idea, how to open his beak. If you put him in lap, it will be more easy(if he flaps much you can wrap him in a towel to feed)). In start you will see small seeds being fed and in later part, the pigeon is being fed on peanuts. Pea/corns will be fed in the very same way as peanuts.