Traceroute on a Mac, through the broadband company and host to an
unresponsive server.
Barring a major networking problem, like a city-wide power outage,
traceroute will reach your hosting company. Now, you just need to
determine whether only your server is ill or a whole rack or room has gone
down.
You can’t tell this just from traceroute, but chances are the servers
physically next to yours have similar IP addresses. So, you could vary the
last number of your server’s IP address and check for any response. If your
server’s IP address is 123.123.123.123, you could try:
C:\> ping 123.123.123.121
C:\> ping 123.123.123.122
C:\> ping 123.123.123.124
C:\> ping 123.123.123.125