ABC consulting is your company name. It is already in a form, a limited liability company.  The only time you would need a Dba (which means doing business as) is if you are a sole proprietorship and you use a name other than yourbreak name (so you would register a trade name) or if the secretary of state in your state indicates your limited liability company is too close in name to another existing registered name, the secretary of state will make you use a forced d/b/a.