I’ve added an A record (18.104.22.168) to my DNS here at CF to point to my Inmotion Shared Hosting. However, old A record can be found 22.214.171.124 when I search for it at dnschecker.org and the website is down.
Typically DNS updates at CF have been lighting fast.
How long until an A record with Automatic TTL propagates?
Since the record is proxied, CF will return the same CF-owned IP address as before. The internal config should be updated though, so if it’s still not working then the IP address you put isn’t working or there’s an issue with your CF configuration.
Could you share your domain or the error you’re getting when trying to access it?
As said before, since CF proxies the record the 104 isn’t “old”, it just represents all CF servers.
521 means that, for some reason, CF couldn’t establish a connection with the server. Maybe your web host is having issues, their firewall isn’t properly set up, their DDOS mitigation flagged Cloudflare, etc.