e-mail address used by network administrators to register with Internic.

Most well managed domains on the Internet will have role-based e-mail addresses defined to handle problems with e-mail (postmaster) and the Domain Name System (hostmaster).

The name likely stuck because hostnames were originally mapped to IP addresses using the file /etc/hosts. An alternative explanation: a hostmaster administers hosts.

Y'know, if you log in, you can write something here, or contact authors directly on the site. Create a New User if you don't already have an account.