Android : How to fastly check if URL server is available

I have some URL in the form

http://www.mywebsite.com/util/conv?a=1&from=%s&to=%s

and want to check if are availables.

The links give redirect me on a bad request page if I try to open these with a browser, however via code I can get the data that I need

Use a try catch block on Http request procedure is pretty slow, so I'm wondering how I could ping a similar address to check if its server is active.

I have tried

boolean reachable = InetAddress.getByName(myLink).isReachable(6000);

but returns always false

Someone could help me?