subdomain

[Kevin Darcy]

luke wrote:

>hi, i currently example.com from godaddy.com working with a couple of
>subdomains, namely, www. mail. etc...
>all through godaddy's dns. i have a dynamic ip address, so i can't run my
>own dns for example.com
>i want to add another subdomain, blah.example.com and setup
>www.blah.example.com and a few other subdomains
>for blah.example.com. the primary dns is still going to have to be through
>godaddy, but if i add an a record for blah
>pointing to the same ip address as example.com will requests for
>blah2.blah.example.com query the godaddy's name
>server or the one running on my machine? currently, www. mail. etc. are
>CNAME records at godaddy's dns. hope this
>makes sense. i'm new to dns and don't really have the terminology down, but
>i'm reading lots of online docs and picking
>it up slowly but surely. thanks
>
As viewed by ordinary iterative resolvers on the Internet, a sub*domain* 
is not a sub*zone* unless there is a delegation for it from the parent 
zone. So, in the absence of any delegations, you can go many subdomain 
levels deep within a given zone. All of the queries for those subdomain 
names would still go to the authoritative nameservers for the domain.

Now, whether godaddy allows such subdomain nesting, is a different 
question, one that is arguably off-topic for this list, and one which I 
cannot answer, having never managed a domain through godaddy...

                                                                         
                                                         - Kevin