The Perl 5 module Net::CIDR::Set represents sets of IP addresses
and allows standard set operations (union, intersection, membership
test etc) to be performed on them.
In spite of the name it can work with sets consisting of arbitrary
ranges of IP addresses - not just CIDR blocks.
Both IPv4 and IPv6 addresses are handled - but they may not be mixed
in the same set.

Homepage:
https://metacpan.org/release/Net-CIDR-Set
