What this table is
Each price is the listed 1 oz product in the existing bullion feed, set next to that feed's spot price. The premium is the feed's own premium, not a separate quote. This feed has no cash or wire price distinct from the listed price, so this page does not show one.
Registered ounces behind the futures market are on the COMEX inventory tracker. How a dealer premium differs from a futures claim is in Paper Silver vs Physical Silver.