SiteUptime - Website Uptime Monitoring Service

SiteUptime provides a service to monitor the uptime stability of websites. Free users can monitor one of their websites through this service, and when the website becomes inaccessible, it will send out reminder emails.

After registering as a free member of SiteUptime, you can add one site for monitoring. The service will automatically check every 30 minutes or 60 minutes. The ports that can be monitored include 80 (http), 21 (ftp), 25 (smtp), and 110 (pop3). There are four monitoring server locations available: San Francisco, Chicago, New York, and London, allowing users to choose any one of them. You will receive email notifications from SiteUptime both when the site goes down and when it comes back up. Additionally, free users can also access statistical reports on a dedicated page.