categorized answer QandAEditors well, if you just need IP addresses, this works on Win32 and Linux and doesn't require any external module: <code> my @ip = (); my($name,$aliases,$addrtype,$length,@addrs) = gethostbyname('localhost'); # @addrs should contain the loopback - 127.0.0.1 # you can skip it if you want foreach my $addr (@addrs) { push(@ip, join('.', unpack('C4', $addr))); } ($name,$aliases,$addrtype,$length,@addrs) = gethostbyname($name); # @addrs contains our public IP address(es) foreach my $addr (@addrs) { push(@ip, join('.', unpack('C4', $addr))); } foreach my $ip (@ip) { print $ip, "\n"; } </code> 166645