We use hyperspin to monitor the sites status and it monitors from the following locations, we have had no downtime whatsoever.. Can you think of another reason we can look at as to why you can see the site? You have got me worried now..

ALL MONITORING STATIONS
1. Seattle, Washington, USA
2. San Jose, California, USA
3. Dallas, Texas, USA
4. Ashburn, Virginia, USA
5. Chicago, Illinois, USA
6. Montreal, Quebec, Canada
7. Maidenhead, Berkshire, UK
8. Amsterdam, Netherlands
9. Madrid, Spain
10. Milan, Italy
11. Frankfurt, Hesse, Germany
12. Singapore
13. Brisbane, Queensland, Australia