get_telnumbers()

// Telnumbers function
function get_telnumbers() {

    switch_to_blog( 1 );

    $output = '';

    $posts = get_posts( array( 'post_type' => 'telnumbers',
                               'posts_per_page' => -1 ) );

    foreach ( $posts as $post ) {
        if ( ip_info( 'Visitor', 'Country Code' ) == $post->post_title ) {
            $output = '<p>'.ip_info( 'Visitor', 'Country Code' ).': '.$post->post_content.'</p>';
            break;
        }
    }

    if ( $output == '' ) {
        foreach ( $posts as $post ) {
            if ( $post->post_title == 'Unset' ) {
                $output = '<p>'.ip_info( 'Visitor', 'Country Code' ).': '.$post->post_content.'</p>';
                break;
            }
        }
    }

    restore_current_blog();

    return $output;

    unset( $posts, $post );
}
add_shortcode( 'get-telnumbers', 'get_telnumbers' );