That registration has value - its an asset that makes recurring revenue - so they'd likely transfer (sell) it to another registrar. You'd get an email with a link to a new backend to login to etc. This has happened to me numerous times over the years (they usually call it an acquisition, but I suspect many of them were effectively going out of business). It is a slight pain to learn a new system, but you never lose the domain or anything.<p>Worst case scenario Verisign or ICANN would step in. The registrar doesn't own the domain, you do. They are just the custodian. Similar to how a stock broker doesn't own the stock you hold with them and even if they go out of business, you still own the stock.