[{"data":1,"prerenderedAt":60},["ShallowReactive",2],{"$f17fgqtfyz34pt":3},{"title":4,"seoTitle":5,"description":6,"route":7,"kind":8,"toolKey":9,"intro":10,"indexable":11,"sections":12,"related":56},"DNS Lookup & Online NSLookup","DNS Lookup & Online NSLookup | nslookup.online","Look up DNS records for a domain. View record values, TTLs and public resolver responses with clear explanations of DNS errors.","\u002F","tool","dns","Query DNS records with a public resolver. Read the answer, not just the record.",true,[13,20,44,50],{"id":14,"title":15,"paragraphs":16,"code":19},"read-answer","Understand the answer, not just the record.",[17,18],"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\nname            TTL   class type value\n\nDOCUMENTATION EXAMPLE — not a live DNS response",{"id":21,"title":22,"paragraphs":23,"rows":25},"reference","A closer look at a DNS answer",[24],"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.",[26,29,32,35,38,41],{"label":27,"value":28},"A \u002F AAAA","IPv4 \u002F IPv6 addresses for this name.",{"label":30,"value":31},"MX","Mail-routing targets and numeric priorities.",{"label":33,"value":34},"TXT","Text used for verification and email policy records.",{"label":36,"value":37},"CNAME","An alias from one DNS name to another.",{"label":39,"value":40},"NS \u002F SOA","Nameserver information and zone authority metadata.",{"label":42,"value":43},"PTR \u002F SRV \u002F CAA","Reverse names, service targets, or certificate-authority authorization.",{"id":45,"title":46,"paragraphs":47},"different-answers","Why two DNS tools can disagree",[48,49],"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\u002Fservice overhead and response transfer. It is not the authoritative server’s pure resolution time and should not be used as a resolver performance ranking.",{"id":51,"title":52,"paragraphs":53},"questions","Common questions",[54,55],"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.",[57,58,59],"\u002Fguides\u002Fnslookup-command\u002F","\u002Fguides\u002Fa-record-vs-cname\u002F","\u002Fmx-lookup\u002F",1792661399003]