get_post_ancestors can give you the ID of the object an attachment is associated with:
$attachment_id = 42;
$parent = get_post_ancestors( $attachment_id );
echo $parent[0]; // $parent will be an arrayget_post_ancestors can give you the ID of the object an attachment is associated with:
$attachment_id = 42;
$parent = get_post_ancestors( $attachment_id );
echo $parent[0]; // $parent will be an array