How to check the glue records stored for a given domain.

Let's say that it is a .org domain, first of all query for the nameserver of the TLD:

dig +short org. NS

than query one TLD about the domain:

dig +norec @b2.org.afilias-nst.org. rigacci.org. NS

check the ADDITIONAL SECTION into the answer:

;; AUTHORITY SECTION:
rigacci.org.            86400   IN      NS      ns1.rigacci.org.
rigacci.org.            86400   IN      NS      ns2.rigacci.org.

;; ADDITIONAL SECTION:
ns1.rigacci.org.        86400   IN      A       92.222.46.168
ns2.rigacci.org.        86400   IN      A       176.9.39.130

• https://www.dnsqueries.com/
• How to test DNS glue record?