127.0.0.1    localhost
127.0.0.1        subdomain.domain.com
127.0.0.1        test1.subdomain.domain.com
127.0.0.1        test2.subdomain.domain.com
xx.xx.xxx.xxx    subdomain.domain.com   subdomain
xx.xx.xxx.xxx    test2.subdomain.domain.com       subdomain
xx.xx.xxx.xxx    test1.subdomain.domain.com      subdomain

# The following lines are desirable for IPv6 capable hosts
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters