Look up DNS records of any domain
A and AAAA records as resolvers around the world see them
What the DNS lookup shows
Every check server asks its own resolver and returns the records it received.
IPv4 and IPv6 addresses
A and AAAA records of the domain, each with its TTL.
Reverse DNS
Enter an IP address to get its PTR record, the host name the address points back to.
Propagation
Answers from different locations show whether a DNS change has spread and which resolvers still cache old records.
Frequently asked questions
Short answers about how the check works and how to read its results.
Why do locations return different records?
Resolvers cache records for their TTL, and some DNS providers answer depending on where the request comes from. After a change, differences disappear once the old TTL expires everywhere.
What is TTL?
Time to live: how many seconds a resolver may keep a record in its cache before asking the authoritative name server again.
How do I find the host name of an IP address?
Enter the IP address and the lookup returns its PTR record from reverse DNS.
Which record types are checked?
A and AAAA for domains, and PTR for IP addresses. Other types such as MX, NS, TXT or CAA are not queried.
All tools in one place
Check availability, latency and routing of websites, servers and IP addresses from different locations.