SYNOPSIS

     use Regexp::IPvv qw($IPvv_re);
    
     $address =~ /^$IPv4_re$/ and print "IPv4 address\n";

DESCRIPTION

    If you do not use anchor, beware of cases like:

     "255.255.255.256" =~ /($IPv4_re)/; # true & capture "255.255.255.25"

SEE ALSO

    Regexp::IPv6