Domain hack

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A domain hack is a domain name that suggests a word, phrase, or name when concatenating two or more adjacent levels of that domain.^[1][2][3] For example, bir.ds and examp.le, using the fictitious country-code domains .ds and .le, suggest the words birds 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.