Are customers having trouble opening your website?

A client has had intermittent problems opening their website. Clients are complaining about the same thing. It may be network related and to do with the customers ISP. To complicate matters, the domain name is registered with a different company to the hosting company.

An interesting tool you can use to see if the site is up is - http://isitup.org/. Just type in the URL and it will tell you if it is up or not. This can be a good way to tell if it's your network/computer causing the issue or if the site is actually down.

I would also recommend keeping a list of the ISP's your customers are coming from (the ones having the problems), so we can try and find some common occurrences.