You're looking for a dead man's switch. https://deadmanssnitch.com is a good hosted service or Uptime Kuma (https://github.com/louislam/uptime-kuma) can be configured to do the same thing. - Source: Hacker News / about 1 month ago

Uptime Kuma can also monitor certificate expiration; you can also enable it to show you how many days are left until it expires. https://github.com/louislam/uptime-kuma. - Source: Hacker News / 3 months ago

- Web terminal & live logs I'm trying it as an alternative to Portainer and I'm loving it. It seems to fit perfectly in my flow. Code and more info: https://github.com/louislam/uptime-kuma (Not affiliated, just a happy user). - Source: Hacker News / 5 months ago

Uptime Kuma is a self-hosted monitoring service that you can use to keep track of the heath of your applications, websites, and APIs. You can configure it to watch services with different types of health checks and set up email notifications for when there are problems. Uptime Kuma also lets you design custom status pages that you can use to share public information about your service health statuses and to... - Source: dev.to / 8 months ago

It's for people who owns a log of servers/computers at home and need to monitor its uptime. For safety reason, it's impossible to expose the system to the public internet, we can only use the "push" strategy to report the up status. This tool is just for this purpose: request an URL at some interval repeatedly. Recommended to use this with uptime-kuma ( - Source: Hacker News / 9 months ago

Whoisology is a massive, searchable database that provides an in-depth view of domain name ownership through its cross-referenced domain name whois records. The tool's priority is on reverse whois, to assist with security, cyber crime investigation, research and other business endeavors. Our appreciation for this recommendation goes to crashdodson. Source: over 1 year ago

It looks like the domain was registered in 2006 (info from https://whoisrequest.com/history/), and went offline in 2018. A long shot, but if the person who registered the site didn't hide behind a privacy option, you might be able to dig up their email address from looking into the historical WHOIS data via a site like https://whoisology.com/, or https://www.domainiq.com/. Source: almost 2 years ago

More then just reverse lookups on emails, Whoisology https://whoisology.com/#advanced Website analytics, Traffic, location, Overview etc http://www.statscrop.com/www/inteltechniques.com Youtube Video meta Data Viewer, GPS, Keywords etc http://www.amnestyusa.org/citizenevidence/. - Source: dev.to / about 3 years ago