Domain hack

A domain hack is a domain name that suggests a word, phrase, or name when concatenating two or more adjacent levels of that domain. For example, ro.bot and examp.le, using the domains .bot and .le, suggest the words robot and example respectively. In this context, the word hack denotes a clever trick (as in programming), not an exploit or break-in (as in security).

Domain hacks offer the ability to produce short domain names. This makes them potentially valuable as redirectors, pastebins, base domains from which to delegate subdomains and URL shortening services.