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Glue records are one of those DNS details you only notice when they break. They sit at the boundary between the parent zone (like .com) and your domain, and they can determine whether resolvers can even reach your authoritative nameservers. In this article we explain what glue records are, when they are required, how they improve reliability, and how to check your own domain for glue with simple, practical commands.
What glue records are (and the DNS “chicken and egg” [...]