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Catch a CNAME that starts pointing elsewhereTenium’s DNS monitor alerts when a CNAME target changes, which is how a lot of “the site vanished” incidents start.
Start freeWhat a CNAME is
A CNAME makes one name an alias of another. www is often a CNAME to the apex or to a host on a CDN. A name cannot have a CNAME and any other record at the same time, so apex domains usually use A or ALIAS instead.
Chains
Resolvers follow the chain until they reach an A or AAAA. This page shows the CNAME at the name you typed, not every hop.
Related checks
A lookup · AAAA lookup · DNS lookup · DNS monitoring
Command-line equivalent
dig +short www.example.com CNAMEMore free tools
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