I know there are modules out there, like Net::Netmask for instance, but I wonder if it could be achieved from core ?

Everything can be achieved from core. If you know a module (like Net::Netmask) which does what you want, simply inspect the source (and the source of its dependencies) and do it that way yourself.

FWIW, I like Net::CIDR::Lite.

In reply to Re: Matching an IP/subnet amongst a large number of ip subnets by hippo
in thread Matching an IP/subnet amongst a large number of ip subnets by llarochelle

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