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Manually checking if an IP is in an RBL using dig

There are already great RBL checking tools like, if you're trying to find out if you're listed, but if you want more manual control, like getting the raw return value for a specific IP, in a specific RBL list, you can use "dig".

To do this, you simply do a lookup, of the IPv4 IP in reverse order, as a subdomain of the RBL list.

For example, lets say you want to check IP: ...
In the RBL list:

To do this, you'd run the query:


and check the result.

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