You can check the DNS with whatismydns.net and intodns.com. Source: about 1 year ago

Feel free to check https://intodns.com/ and https://www.whatsmydns.net/ to monitor propagation and ensure the DNS records are correctly set. Source: about 1 year ago

Just in case, it would be a good idea to check the DNS with a tool like intodns.com, just to make sure everything is working as intended. Source: over 1 year ago

I know this is a little old but I came across some of my tools I used when going through bookmarks: - https://mail-tester.com Although I already mentioned this above, this has been a lifesaver when it comes to figuring out why 3rd parties are rejecting your mail - https://intodns.com Helps give you a more thorough view into how your DNS settings are configured. - https://mailu.io Not a diagnostic tool, but a... Source: over 1 year ago

If you need external confirmation of things, intodns.com and dnschecker.org are both pretty good. Source: over 1 year ago

Https://onlineornot.com - I built a cute widget for it, and eventually that turned into a business. - Source: Hacker News / 20 days ago

This kinda sounds like the tool I built: OnlineOrNot (https://onlineornot.com) It sends reminder alerts over email and SMS (and phone calls soon) until the incident is resolved. It also integrates with PagerDuty/Opsgenie/Incident.io if you want something a bit more heavy duty. - Source: Hacker News / about 2 months ago

Most folks here are probably tired of hearing about it, but I work on https://onlineornot.com Uptime monitoring (and status pages) for software teams. In my words, the aim is "monitoring that doesn't suck" - I've worked at companies with proactive monitoring like OnlineOrNot before, and was surprised how little the incumbents are innovating in the space. One customer once told me "f*k , all their system... - Source: Hacker News / 4 months ago

OnlineOrNot.com - OnlineOrNot provides uptime monitoring for websites and APIs, monitoring for cron jobs and scheduled tasks. Also provides status pages. The first five checks with a 3-minute interval are free. The free tier sends alerts via Slack, Discord, and Email. - Source: dev.to / 5 months ago

I'm coming up on three years of running OnlineOrNot (https://onlineornot.com) in 3ish weeks. In short, I wrote about React from my own perspective for a year (despite thousands out there doing the same thing), made money, and got inspired to do the same thing with an uptime monitoring tool (200th alternative to pingdom when I released it). I turned a tool I used for convincing contracting clients to not cheap out... - Source: Hacker News / 5 months ago