Reverse DNS RFCs and Recommendations

Wed Oct 30 22:01:55 UTC 2013

On Wed, Oct 30, 2013 at 2:33 PM, Nolan Rollo <nrollo at kw-corp.com> wrote:

> So in the four examples below, 3 of them preface the IP with an alpha
> character. Charter however, starts the rDNS off with a number. I'm not
> arguing with anyone but what potential problems could that cause with DNS?
> I'm also thinking of the famous  www.1and1.com, where the number "1"
> starts off one of the sections.
>

Using domain name parts that start with a number will likely cause issues
for anyone running resolvers written in the 80's.

Anyone running resolvers that are less than ~25 years will likely not have
any issues.

  Scott