You can find your viewing card number using your remote:-
For Sky Q press Home on your Sky Q remote, select Settings, then select System Information
For Sky+ HD press Services on your Sky+ HD remote, select Settings, then select System Details
Why would I need my viewing card number?
You may need your viewing card number when ordering a pay per view (PPV) from a 3rd party provider such as ITV Box Office or BoxNation. 3rd party subscription services such as BT Sport and Premier Sports may also require this when taking out subscriptions to their services.
For further help join the discussion on our Sky Q or Sky+ boards.