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Hey destroyer998, you can do PTR lookups using the IP info API. There's also the host reputation API for checking DNSBLs.

We have thought about some other DNS related APIs.. what would you be using it for?

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I would be using it to check if a user has created the correct DNS settings when they try to link their domain to a webhosting package of instance. Or wether someone has setup their domain correctly to receive emails.

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