$ host paulgraham.com paulgraham.com has address 68.142.205.137 paulgraham.com has address 216.252.126.190 paulgraham.com mail is handled by 10 milter1.store.vip.mud.yahoo.com. paulgraham.com mail is handled by 10 milter1.store.vip.sp1.yahoo.com.

$ host 68.142.205.137 137.205.142.68.in-addr.arpa domain name pointer html1.store.vip.mud.yahoo.com. $ host 216.252.126.190 190.126.252.216.in-addr.arpa domain name pointer html1.store.vip.sp1.yahoo.com.