DNS Lookup & Online NSLookup

Understand the answer, not just the record.

A DNS lookup asks a resolver for records attached to a particular name. Choose the exact hostname and the record type you need. The answer describes that resolver’s view at the time of your request; it is not a survey of every DNS server on the internet.

Start with an A record for IPv4 addresses or AAAA for IPv6. Change the type without changing the hostname to investigate mail routing, verification strings or nameservers. Common records performs six separate queries, not an unreliable ANY request.

example.com.    300    IN    A    192.0.2.10
name            TTL   class type value

DOCUMENTATION EXAMPLE — not a live DNS response

A closer look at a DNS answer

Each part of a record has a different job. The owner name identifies where it is published, the record type determines how the value is interpreted, and TTL is the cache lifetime in seconds. A TTL is not a promise of global propagation completion.

A / AAAA

IPv4 / IPv6 addresses for this name.

MX

Mail-routing targets and numeric priorities.

TXT

Text used for verification and email policy records.

CNAME

An alias from one DNS name to another.

NS / SOA

Nameserver information and zone authority metadata.

PTR / SRV / CAA

Reverse names, service targets, or certificate-authority authorization.

Why two DNS tools can disagree

Resolvers may have different cached responses, reach different authoritative infrastructure or receive answers influenced by routing and configuration. Querying Google and then Cloudflare is a resolver comparison, not a global propagation test.

The displayed HTTPS round-trip includes the browser’s network request, TLS/service overhead and response transfer. It is not the authoritative server’s pure resolution time and should not be used as a resolver performance ranking.

Common questions

No records with NOERROR means the requested record type was not returned; it does not establish that a name is absent. NXDOMAIN means the chosen resolver reports that the queried name does not exist, not that the domain is available to register.

SERVFAIL and REFUSED are distinct DNS statuses. An HTTP timeout or network failure is a transport problem and carries no DNS verdict. Retry deliberately rather than treating every empty output as a broken domain.