Thanks for mentioning that. I had been using isup.me but ran in issues when checking while some images failed to load on a site I volunteer for - it would check

Thanks for mentioning that. I had been using isup.me but ran in issues when checking while some images failed to load on a site I volunteer for - it would check the responsiveness on the URL of the server itself, which gave a 404 as it wasn't supposed to be accessed by public and isup.me would interpret that as the server always being down... downforme.org seems to deal with that better, thanks!