Port for pure http requests

Hi,
i need send request to server backendless with pure http code, my library in my board is low level and to first handshake with server with this ip:149.56.79.124 but i need port? what is port for requests(login, read data and others)???

my request is like this:
POST /AppId/RestId/users/login HTTP/1.1
Host: api.backendless.com
Content-Type: application/json

{
“login” : "aaaaa@bbbbb.com",
“password” : “123456789”
}

The default or
port for http protocol is 80.