IP address character limit

my client in his template is using <?php comment_author_IP(); ?> to display IP’s of comment authors. Recently he came to me with idea of limiting whole number to several characters. Final result should be something simillar to:

192.168…

How can i achieve it? I’ve tried with jquery but without success. It looked like it was not responding to the jquery code..

thank you!

You can filter 'get_comment_author_IP':

add_filter( 'get_comment_author_IP', 'wpse_77254_trim_comment_ip' );

function wpse_77254_trim_comment_ip( $ip )
{
    return implode( '.', array_slice(explode( '.', $ip ), 2) ) . '…';
}

Note this will fail with IPv6 addresses.