There used to be a minimum length for .com, .net, and .org. It was enforced by the registry to avoid confusion or special-case privileging. When domain names b

There used to be a minimum length for .com, .net, and .org. It was enforced by the registry to avoid confusion or special-case privileging. When domain names became big business, those rules were changed. Another old rule is that the domain name could not start with a digit.