If one were to ask a telephone company If a particular address is within range of DSL service, All they will say frequently is "We don't know as We need a phone number to figure that out with", So with DSL It's potluck, your neighbor may have DSL, But that will never guarantee that Your address will ever have It.
It appears the assertion I made in my original post is correct. The information is there if you want it.
Personally, I feel my time is too valuable to spend on entering every possible address into these websites. However, for those of you who feel that we must absolutely have such information, have at it. -- This isn't fair! I was only supposed to hate just ONE presidential candidate!