Networking / WEB Tools

Here are some online tools that are useful for various internet and networking things.

BGP.Tools - It is useful for looking up DNS and peers and that sort of stuff which I tend to check into before trying out a host.
Can I Use - This site has tables of which browsers and version of browsers support various CSS, HTML and the rest of that stuff.
DNS Checker - When switching hosts and IPs the DNS propagation can be strange. I use this site to keep an eye on it so I know I can wipe the old server.
The W3C Markup Validation Service - The HTML validator use useful for making sure there are no errors in your HTML. With Hugo I really don’t have to worry about it unless I am editing shortcodes and templates.