At Hostinger servers, all outgoing ports are open (except 0 and 25). You can find a full list of open ports in this table:
For Shared (both hPanel and cPanel), Cloud, and WordPress hosting, we do not modify the list and open any additional ports.
For cPanel Reseller hosting, you can open additional ports using WHM, follow this official documentation for details.
If you would like to have full control over which ports are open, VPS hosting will be the best solution for you.