/etc/hosts
/etc/nodename
/etc/hostname.xxn (xxn = network interface, such as hme0)
/etc/net/ticlts/hosts
/etc/net/ticots/hosts
/etc/net/ticotsord/hosts
/etc/inet/ipnodes
(if file exists and if hostname entry exists)
/etc/hosts
/etc/defaultrouter
/etc/netmasks
/software/os-extras/data/gateway
/.software/admin/xhier/admin/data/access-rights
/software/sendmail/config/local/clients
on MX hosts