2. What's the technical terminology for the request for AT&T to simply start advertising our netblock called? I'm wondering if they're not understanding our request.
You hit the nail on the head with that question. It's called a purchase order request. You bought vanilla Internet access which uses AT&T's aggregate address announcements and now you want them to provide a different service where they manage special announcements for your address prefix. There ain't no such thing as a free lunch. When dealing with large companies, you get cheap prices when you buy standard products, not when you buy customized services. --Michael Dillon P.S. if your network is all in one cage, it can't be that difficult to just renumber it all into AT&T address space.