Reachability problems for www.listen-to.com

Some of my users are saying they cannot get to
www.listen-to.com, www.talk-servers.com and
www.electro-tech-online.com

One of them claims he's observed a pattern and that
things hosted by ev1servers.net aren't working.

I can get to them from several different places, but
I notice that e.g. www.listen-to.com has a 69.* address,
which might still be listed as bogus by some people.