whatsmydns.net is a free online tool that lets you quickly and easily perform a DNS lookup to check DNS propagation and see information of any domain from DNS servers located in many countries all around the world.

You can test changes made to new or existing domains and see if they have been updated correctly without the need to manually query remote servers. This gives you immediate insight into how users globally may be resolving DNS records for your website, email or other online service.

How long does DNS propagation take?
How long DNS propagation takes usually depends on your records TTL setting. This can be anywhere from several minutes up to 48-72 hours or longer. However, there are sometimes other reasons for a long propagation time.