Server IP's cease to exist

[SpeedNick]

As said above, they no longer work. I have no idea what to do or who to ask and I can't get intouch with my server administrator.

Is there anything anyone can reccomend to do or instruct.

Thanks,
Nick.

edit - A times we get the "No website is configured at this adress message" so the server is up, but the pages take a long time to load. We're unable to connect via ftp, ssh and we can't access whm or cPanel.

[chirpy]

Only the NOC where your server is hosted is likely going to be able to help in such a situation to determine whether the problem is network or server related.