The best replacement for hostname is ip.

The best alternatives to hostname are rated as following:
★★★★★  ip
★★★★★  hostname
★★★★  subdomain
★★★★  ip address
★★★  domain
★★★  domain name
★★  cname
★★  nameserver
★★  host
★★  machine name
★★  fqdn
★  localhost
★  computer name
★  dns name
★  uname
★  netbios name
  ftp address
  dns

Your alternative for hostname is not listed? Suggest!
Speaking about hostname, one probably shouldn't forget about ip.

Other search terms related to hostname and their ratings are:
★★★★★ ip
★★ port number
★ ping
★ nmap
You have in mind a companion for hostname and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of hostname in all years. Click on graph for more.
hostname
ip
hostname