Yes, it seems the server is not available. It's either in maintenance or turned off permanently. You can check if a server is up or not with the ping command. Below there is a ping operation to the mentioned IP address.
C:\Users\11>ping 72.35.20.181
Pinging 72.35.20.181 with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Ping statistics for 72.35.20.181:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),