A handy website for when you need to instantly perform a DNS lookup is whatsmydns.net.
What can this website accomplish for you? With the ‘What’s My DNS’ website, you can check a domain name’s current IP address and DNS record information against multiple name servers located in different parts of the world.
This allows you to check the current state of DNS propagation after having made changes to your domains records – it’s pretty great. We’d highly recommend!