gethostbyaddr(192.168.1.1, AF_INET);

##</code><code>##

    $ip = inet_aton('192.168.1.1');
    print gethostbyaddr($ip, AF_INET);

##</code><code>##

    my $ip = inet_aton($&);
    my $name = gethostbyaddr($ip, AF_INET);