WebAdmin Student / Learning Support Contact List UK/US

I have a completely free public service educational website and would like to have educational institutions make their students aware of it, link to it etc. I do not wish to spam anyone (I will email then ring individually if possible) yet cannot find a list of contacts presumably because so many do. I would like emails and telephone numbers (and preferably snail mail addresses) of webadmins in Academic Support/ Learning Support for as many as possible universities and schools in the US and UK. Details must be current.