DNS Lookup
Query the live DNS records behind any domain or hostname.
What a DNS lookup returns
A DNS lookup asks a resolver what records are published for a name. The answer depends on the record type: an A record returns an IPv4 address, an AAAA record returns an IPv6 address, and a CNAME returns another name that the lookup then follows.
This tool queries public recursive resolvers over DNS-over-HTTPS and shows what they return right now. It reads the same data your browser would, without the browser cache in the way.
Address records: A, AAAA and CNAME
A and AAAA records map a hostname directly to an address. A domain can publish several of each, and resolvers may return them in any order — that is a common way to spread traffic across servers.
A CNAME points one name at another instead of at an address. Because a CNAME replaces all other data at that name, it cannot coexist with other record types on the same label. That is why a CNAME is not valid at the apex of a domain, where NS and SOA records must live.
Why results can differ between tools
Every record carries a TTL — the number of seconds a resolver may cache it. Two tools querying different resolvers can legitimately return different answers while a change is still propagating, because one resolver is serving a cached copy.
If you have just changed a record and want to know whether it has settled, the propagation checker compares several resolvers side by side.