Latest date a warranty extension can be purchased

We have twice purchased extensions for both "4-Hour On-Site Service" and "ProSupport Plus" that begin beyond the End Date. i am trying to understand how many more times I can continue to buy the extensions...or if I could buy a multi-year extension (say 2 or 3 years). Thanks.

You could enter the service tag number here, then click the Warranty tab to see the start and end date. After the end date, you cannot purchase a warranty extension.

Perhaps what I am asking is: how can I know the End-Of-Life date for a specific server? Is there some way to find this using the service tag?

You will need to contact the Extended Services team to get these questions answered. 1-877-277-9723, 1-866-777-1542