You can also use "-", as in http://www.clearwater-fl.com/.
Pete
----- Original Message -----
From: "Derek Glidden" <dglidden@illusionary.com>
To: <slug@nks.net>
Sent: Wednesday, May 22, 2002 2:31 AM
Subject: Re: [SLUG] domain name question
> On Tue, 2002-05-21 at 23:00, Smitty wrote:
> > Anyone know which keyboard characters one cannot use in a domain name?
> > Smitty
>
> RFC952 defines a hostname as:
>
> <name> ::= <let>[*[<let-or-digit-or-hyphen>]<let-or-digit>]
>
> A "let" is a letter A-Z, digit is 0-9.
>
> RFC1123 relaxes it a bit: "The syntax of a legal Internet host name was
> specified in RFC-952 [DNS:4]. One aspect of host name syntax is hereby
> changed: the restriction on the first character is relaxed to allow
> either a letter or a digit. Host software MUST support this more
> liberal syntax."
>
> So a FQDN must begin with only a letter or digit, use only letters,
> digits and hyphens in the name and conclude with only a letter or digit.
>
> Of course, you could create something that was otherwise, but it would
> likely break a lot of software trying to interact with it.
>
>
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