What are my GLUE records?
When setting up nameservers at your domain registrar, it is necessary to provide an IP address of the authoritative nameserver. This IP address is called the GLUE record.
For example, if you have two nameserver that you own and are trying to make authoritative. You would give your domain Registrar both the names and IP addresses.
2. Run the following command against one of the 'root nameservers' to see the GLUE IP address:
dig @a.gtld-servers.net domain.tld NS
3. Observe in the output the "Additional Section". This will contain the GLUE IP records.
;; QUESTION SECTION:
;domain.tld. IN NS
;; AUTHORITY SECTION:
domain.tld. 172800 IN NS ns1.domain.tld.
domain.tld. 172800 IN NS ns2.domain.tld.
;; ADDITIONAL SECTION:
ns1.domain.tld. 172800 IN A 111.222.333.444
ns2.domain.tld. 172800 IN A 111.222.333.444