When your domain name, name servers are first set or changed the internet needs to catch up. The internet uses name servers all over the world to tell people how to find your website. When you update your name servers where the domain is registered it can take up to "72 hours" for those changes to propagate around the world. Propagation delay time can vary for a variety of reasons. Delays can be caused by the register itself and the regular internet noises.
A great way to check your NAMESERVER propagation is with the website What's my DNS.
Simply enter your domain name and select NS in the drop-down menu and then click search.
Click here to visit https://www.whatsmydns.net/
