DOMAIN PROBLEM

We have 3 domain sites. These are old domains which we have had for over a decade. 1 is working the other 2 can only be found via a backdoor.  We advertise on our business cards with the 2 that are not working!   Both links end up with the message in a blue box: "This website is hosted and managed by Homestead.
You can build your own website at homestead.com. "  NOT helpful, because I can't get to my 2 old websites.

Why are the now not working!!!