Previously we posted two more articles to monitor up-time of various sites – Down for everyone or just me & Ding its Up. Though both of them are equally good, but the one I am going to mention in this post (Are My Sites Up) is good for tracking up-time of multiple sites. So it is good to use this site instead, for monitoring all your websites in a single go.
As you can see in the image above, you can add multiple number of sites into your account and then you will keep receiving updates via E-mail. If you want you can even subscribe to receive updates via SMS as well but the service is limited only for some US telecom customers. 🙁 Also do remember that this tool can be used to monitor up-time of a maximum of 50 sites.
Link: Are My Sites Up?