Debugging dns glue records

Sometimes you need to check which glue records are used on domain and where they are pointed

First you should check which nameserver is responding for this tld. For example if we wanna check .com domain we need to ask proper nameserver

dig +short com. NS
e.gtld-servers.net.
k.gtld-servers.net.
j.gtld-servers.net.
h.gtld-servers.net.
m.gtld-servers.net.
a.gtld-servers.net.
l.gtld-servers.net.
i.gtld-servers.net.
g.gtld-servers.net.
c.gtld-servers.net.
d.gtld-servers.net.
f.gtld-servers.net.
b.gtld-servers.net.

    We can chose some random dns server from them and execute

    dig +norec @b.gtld-servers.net. example.com. NS
    

    Then we will get which nameservers on which ip are responding for this domain

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