This is only a subset of Apple's less important domains. For example, iwork.com, apple.ca, itunes.com, etc. are not here.
However, each redirecting domain has this file viewable, so most are publicly viewable. For example, http://itunes.com/init .
Weird, half the time that redirects to http://search.itunes.apple.com/WebObjects/MZContentLink.woa/...