const isopen = require("isopen");
 
// Check single port
isopen('github.com', 80,function(response){
    console.log(response);
});
 
// Check Range 
isopen('github.com', '20-30',function(response){
    console.log(response);
});
 
// Check array of ports 
isopen('github.com', [21,22,80,443],function(response){
    console.log(response);
});

isopen(host,ports,callback);