Multiple DBA's using SMS Campaign Registry

I use my Zoom phone/SMS for 3 different side gig communications with clients. (Hypnosis, Grief Consulting, Dove Release). They are all DBAs (Doing Business As...) under one LLC. Each has a different website associated with it. Is it possible to name a 'blanket campaign' for all? I don't have a website for the LLC itself. --Or do I have to pick one? If that's the case, having a Zoom number for business is no longer 2/3s as useful as it was, and I'd probably drop it.