Dangling CNAME Checker

Check whether a hostname points at a target that no longer resolves, with extra attention to common SaaS target patterns associated with takeover risk.

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Learn how to read CNAME chains, understand alias targets step by step, and spot stale, looping, or takeover-prone CNAME configurations.

What Is a Dangling CNAME?

Learn what a dangling CNAME is, why it can create subdomain takeover risk, what patterns to look for, and how to clean up stale aliases safely.

What is a CNAME record?

A practical reference guide to CNAME records, including what the alias target means, common examples, and where CNAMEs can cause confusion.