Finding what NS is used for a subdomain?

Question

Two questions from a dns newb:

Is it possible for a subdomain to use a different set of nameservers than its parent domain?
Eg: abc.ca uses ns.whatever.com and ns2.whatever.com, while sub.abc.ca uses ns.anything.com and ns2.anything.com
If this is possible, what is the command to look this up? Would something as simple as this work?

dig ns sub.abc.ca

correct syntax should be: dig sub.abc.ca NS – Al-Punk Nov 20 '11 at 21:29 — Al-Punk, Nov 20 '11 at 21:29

score 2 · Accepted Answer · answered Jul 28 '11 at 13:47

2

To be on the safe side you should directly ask the authoritative servers at the parent domain about any NS records for the sub-domain.

% dig +norec @parent sub.example.com. ns

This ensures you'll get the current answer straight from the horses mouth, rather than whatever happens to be in your local recursive resolver's cache.

answered Jul 28 '11 at 13:47

Alnitak

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I get this message: `dig: couldn't get address for 'parent': not found` – Flimm Aug 11 '17 at 09:26
@Flimm `parent` needs to be replaced with the actual hostname of a name server for the parent zone. – Alnitak Aug 11 '17 at 10:38

score -1 · Answer 2 · answered Jul 25 '11 at 18:25

-1

Yes, you're spot on. Other options include: host -t NS sub.abc.ca

answered Jul 25 '11 at 18:25

jman

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Finding what NS is used for a subdomain?

2 Answers2