Those, who actively involved with the Web, should know HostTracker, a company from Ukraine, which has been supporting one of the leading global web monitoring services since 2004. Its goal is to monitor site health and accessibility in near-real-time access. Using alert message system, HostTracker allows to reduce downtimes, to improve quality of service for users, to quickly localize troubles...
"Thank you so much for your service. We were suspecting problems with our
hosting company but they denied any problems saying the issues must be at
our end. We know we do have issues at our end but still suspected that
wasn't the entire story. Your service was able to prove that they are indeed
going down regularly - on average twice a week during the trial period.
Thanks again for providing the information we needed to make a proper
decision on this issue."