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My domain is configured with 5 different ns in domain registrar control pannel.

such as

All ns are binded with same ip. How can I know which ns is first connected to my domain

so that I can change the ip for that to switch my domain to new server and leaving the rest on old server. if in case the new one is not working.

tracert can tell me route with hops but not the ns. 
nslookup can tell me which ip it is connected. but on my domain all are connected with same ip.  
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up vote 4 down vote accepted

There is no ordering to NS records (or any other type of DNS resource records). Nameservers might query any of them to get information about your domain.

Might I ask why you would have 5 nameservers that all point to the same IP address? It's pointless. You might as well just have one nameserver for your domain in that case.

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I have no clue. It was setup by predecessors. – user57221 Jun 14 '12 at 15:49
@user57221: Then - what do you really want to know or achieve with your question? – Michuelnik Jun 14 '12 at 16:08
I need to point the domains to new server. I was thinking may be I will change one main ns to new server and if that will not respond my domains will be pointed to old server as alternative server without any problem. – user57221 Jun 14 '12 at 16:38
If you have 5 nameservers one one of them doesn't respond, then, yes, it will query the other 4. – Celada Jun 14 '12 at 17:08

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