what's a valid domain name?

Vytautas Grigaliunas vyto at fnal.gov
Sun Jan 30 21:47:16 UTC 2011

What is the status of "dotted" hostnames - i.e. a period in the hostname portion of a domain name ?

At one point they were allowed, I believe ? What is the latest official RFC ?



----- Original Message -----
From: Barry Margolin <barmar at alum.mit.edu>
Date: Sunday, January 30, 2011 3:34 pm
Subject: Re: what's a valid domain name?
To: comp-protocols-dns-bind at isc.org

> In article <mailman.1583.1296410997.555.bind-users at lists.isc.org>,
>   Chris Buxton <chris.p.buxton at gmail.com> wrote:
>  > Correct, the requirement to start with a letter was removed ages ago.
>  > Witness 3com.com, which may have been the first.
>  Yes, I'm pretty sure they were the impetus for the change, paving the 
>  way for 1-800-FLOWERS.COM years later.
>  -- 
>  Barry Margolin, barmar at alum.mit.edu
>  Arlington, MA
>  *** PLEASE don't copy me on replies, I'll read them in the group ***
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