If you ping a domain name it gives you the IP.
Pinging google.com [74.125.67.100] with 32 bytes of data:
Reply from 74.125.67.100: bytes=32 time=245ms TTL=52
Reply from 74.125.67.100: bytes=32 time=242ms TTL=52
Reply from 74.125.67.100: bytes=32 time=261ms TTL=52
Reply from 74.125.67.100: bytes=32 time=280ms TTL=52