On 25-Feb-2009, at 17:14, Evan Hunt wrote:

Actually, to be lawyerly about it, while RFC952 says you can't have
a single-character name, it also defines names as including periods
to delimit domain-name components.  So, "m.google.com." is really a
13-character name, with a single-character component at the beginning,
not a single-character name.

Serves me right to try to respond off the top of my head without checking the reference. :)

You're right, 952 talks about the DOD Host Table, and predates period- separated labels forming a FQDN becoming ubiquitous. Most of what it dealt with are single-label names in that host table.

The OP should be looking to RFC1035 section 2.3.1 for the specification for modern host names.



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