Question: I would like to know how to find IP address and/or a MAC addresses of some popular web sites or servers servers.
For example: Google, Hotmail , Yahoo, etc.

Answer: 
Try e.g.

```
ping google.com

```

in a terminal (a command prompt if you are on Windows) to get the resolved IP address printed. This is the easiest way I use in practice, and it is more or less universal.

Otherwise `dig` or `nslookup` are more "correct" for the task, but might not be available, and might give more info than you want.

---

The MAC address is not printed, and I cannot imagine why it would be interesting. You probably only want the IP address.

**EDIT:** Adding my comment about MAC addresses:

> 
> You cannot see MAC addresses for hosts other than on your local network. You can only see the router's MAC address, so if you need the foreign MAC address, then I don't know what you are trying to do.
> 
> 
>
To get the IP use `nslookup` on windows or `dig` on Linux

You cannot query the MAC address as this is only known to the next switch/router in the companies infrastructure. 
Also the MAC address is specific to one single network interface whereas from the network-topology side of view behind one IP there can be hundrets of servers due to NAT/Load Balancing.