Global DNS Checker
The tool 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.
You can test changes made to new or existing domains 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.
What is DNS and how does it work?
The Domain Name System (DNS) is a system used to convert a name (like www.google.com) into an IP address (like 192.168.2.1) which is used by computers to communicate on a network such as the Internet.
When visiting a website, your device asks your local DNS server for the address. If you have not recently visited the site, then it will need to forward the request on to the server responsible for managing it.
Once a result is returned, it is stored locally in a DNS cache to speed up future requests. The amount of time it is stored depends on the configured Time to Live (TTL).
What is DNS Propagation?
DNS propagation is the term commonly used to check the current state of results globally. This process can take only a few minutes or up to 48 hours or longer.
Technically DNS does not propagate, but this is the term that people have become familiar with. Requests are forwarded from the locally used resolver to the authoritative nameserver on demand then cached to speed up future DNS lookups.
For popular websites, results may be cached for people in different parts of the world. If you have recently made changes to your configuration, this may mean that some people will be receiving old results until the TTL expires.
Which DNS records can be checked?
You can perform checks for common record types including:
- A - The most common type, used to point to an IP address.
- CNAME - Canonical name or alias, they point to other records.
- MX - Mail Exchanger, these are used to set email servers and their priority.
- NS - Nameserver, these store the authoritative nameserver.
- TXT - Text, commonly used for configuration settings.