I was wondering If I made a database to store a list of IP CIDR
in a database to block, how I could take an IP of a customer coming
in and find a quick way if it matches a blocked IP in the database?

For instance, in the database I would store something like this: 

Then if someone came in on, it would know that the entire
class C was blocked. Is there an easy way to deal with this type of
thing in PHP/MySQL?


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