Glue records seulement ever exist in le parent zone of a domain name.
Hence in le case of votre example.org domain name, premier find le .org name servers:
% dig +short org. NS
a0.org.afilias-nst.info.
a2.org.afilias-nst.info.
b0.org.afilias-nst.org.
b2.org.afilias-nst.org.
c0.org.afilias-nst.info.
d0.org.afilias-nst.org.
Then, for as beaucoup de of these as you feel like testing, explicitly ask those name servers for le NS records for votre domain:
% dig +norec @a0.org.afilias-nst.info. example.org. NS
Vous devriez get back le correct list of NS records in le "AUTHORITY SECTION". For tout name servers that have correctly configured glue you should see those glue A (and/or AAAA) records appear in le "ADDITONAL SECTION".