what's a valid domain name?

Joseph S D Yao jsdy at tux.org
Tue Feb 1 21:14:26 UTC 2011

On Sun, Jan 30, 2011 at 09:40:51AM +0800, pyh at mail.nsbeta.info wrote:
> Joseph S D Yao writes: 
> > 
> > The labels must follow the rules for ARPANET host names.  They must
> > start with a letter, end with a letter or digit, and have as interior
> > characters only letters, digits, and hyphen.  There are also some
> > restrictions on the length.  Labels must be 63 characters or less. 
> > 
> A label must start with a letter? oh I don't think so.
> How about these domains which all have huge DNS traffic? 
> 163.com
> 126.com
> 51.com
> 56.com 
> yes 163.com is a domain name but "163" also can be treated as a label for 
> domain "com.", is it? 

That's why I said it was modified later.  Did you read the whole
message I wrote?

I spent hours slaving over a hot bit-griddle just to make it for you.

** Joe Yao				jsdy at tux.org - Joseph S. D. Yao

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