Score:0

Does creating a 10th level domain require creating 9 domain that preced to it?

iq flag

Let's say, I own a domain example.com and it's setup correctly in my domain management dashboard. Now I want to create a long subdomain of the 10th level:

d10.d9.d8....d2.example.com

Will all that require that I somehow specify the IP addresses, or whatever what's required, for all the 9 domains that preced it? Or can I go straight to d10. and specify the IP address for d10 only?

djdomi avatar
za flag
you can `c.r.e.a.t.e.s.u.b.dom.tld in a 1.2.3.4` and don't need any other than that
Score:1
cn flag

A major misconception is that a dot in a name is necessarily a delegation. It is NOT.

Said otherwise, in the zonefile of example.com you can totally have this line:

d10.d9.d8.d7.d6.d5.d4.d3.d2.d1.d0 300 IN TXT "why not?"
d10.d9.d8.d7.d6.d5.d4.d3.d2.d1.d0 300 IN A 192.0.2.42

You can look at my longer answer for a similar question ("Do intermediate subdomains need to exist?") at https://serverfault.com/a/973788/396475 from which I am copying here only this:

TL;DR: yes intermediate subdomains need to exist, at least when queried for, per definition of the DNS; they may not exist in the zonefile though.

fr flag
And this capability is heavily relied upon in reverse IPv6 zones (they wouldn't literally work without it).
Patrick Mevzek avatar
cn flag
@Tomek Yes, this is one typical use case, described in my longer answer linked to from there, I did also add other typical cases of such "long" names.
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