Minimum Number of Characters in Host Name?

Lisa Burke lburke at
Tue Mar 13 17:59:38 UTC 2001

Is there a minimum number of characters that a host can be identified by?  I
vaguely remember that a domain name must be at least two characters long,
but I'm not sure if that's an RFC or if that applies also to hosts.

I'd like to name a host with only one character, example:


Lisa Burke
Unix Systems Administrator
mailto:lburke at

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