DNS查询
Look up DNS records online and inspect names, record types, values, TTL, and resolver limits. 简体中文 locale.
Make HTML structure easier to inspect
This tool queries or presents DNS records for a domain so you can inspect names, types, values, and time-to-live informati...
Formatting is not HTML validation
DNS maps names to records such as A, AAAA, CNAME, MX, TXT, NS, and CAA. Authoritative servers publish data while recursive...
How to format HTML
- Enter a domain or host, choose a record type, run the lookup, and record resolver and time. Compare authoritative and recu...
- Enter a domain or host, choose a record type, run the lookup, and record resolver and time. Compare authoritative and recu...
Formatting method
- Read markup structure
The lookup sends a DNS query through a resolver or reads available record data, then displays names, values, status, and T...
- Apply indentation
The lookup sends a DNS query through a resolver or reads available record data, then displays names, values, status, and T...
- Preserve content
The lookup sends a DNS query through a resolver or reads available record data, then displays names, values, status, and T...
Exact parser recovery, optional-tag handling, whitespace policy, embedded-language behavior, and error wording should be c...
Read the formatted result
A useful result identifies record type, owner name, value, TTL, and response status. Consider CNAME chains, negative cachi...
常见错误
Common mistakes include querying the wrong record type, confusing authoritative and cached data, treating TTL as propagati...
Common mistakes include querying the wrong record type, confusing authoritative and cached data, treating TTL as propagati...
限制和特殊情况
The tool cannot guarantee global propagation, resolver policy, authoritative health, DNSSEC correctness, routing, or appli...
The tool cannot guarantee global propagation, resolver policy, authoritative health, DNSSEC correctness, routing, or appli...
Examples
DNS Lookup online — 1
What does DNS lookup show?
Enter a domain or host, choose a record type, run the lookup, and record resolver and time. Compare authoritative and recu...
A useful result identifies record type, owner name, value, TTL, and response status. Consider CNAME chains, negative cachi...
DNS Lookup online — 2
What is a TTL?
Enter a domain or host, choose a record type, run the lookup, and record resolver and time. Compare authoritative and recu...
A useful result identifies record type, owner name, value, TTL, and response status. Consider CNAME chains, negative cachi...
DNS Lookup online — 3
Why do resolvers disagree?
Enter a domain or host, choose a record type, run the lookup, and record resolver and time. Compare authoritative and recu...
A useful result identifies record type, owner name, value, TTL, and response status. Consider CNAME chains, negative cachi...
DNS Lookup online — 4
What is a CNAME chain?
Enter a domain or host, choose a record type, run the lookup, and record resolver and time. Compare authoritative and recu...
A useful result identifies record type, owner name, value, TTL, and response status. Consider CNAME chains, negative cachi...
DNS Lookup online — 5
Can DNS prove a site is online?
Enter a domain or host, choose a record type, run the lookup, and record resolver and time. Compare authoritative and recu...
A useful result identifies record type, owner name, value, TTL, and response status. Consider CNAME chains, negative cachi...
DNS Lookup online — 6
Does it check DNSSEC?
Enter a domain or host, choose a record type, run the lookup, and record resolver and time. Compare authoritative and recu...
A useful result identifies record type, owner name, value, TTL, and response status. Consider CNAME chains, negative cachi...
Frequently asked questions
What does DNS lookup show?
DNS lookup reports an answer from a particular resolver and time. Compare sources and check the authoritative zone, cachin...
What is a TTL?
DNS lookup reports an answer from a particular resolver and time. Compare sources and check the authoritative zone, cachin...
Why do resolvers disagree?
DNS lookup reports an answer from a particular resolver and time. Compare sources and check the authoritative zone, cachin...
What is a CNAME chain?
DNS lookup reports an answer from a particular resolver and time. Compare sources and check the authoritative zone, cachin...
Can DNS prove a site is online?
DNS lookup reports an answer from a particular resolver and time. Compare sources and check the authoritative zone, cachin...
Does it check DNSSEC?
DNS lookup reports an answer from a particular resolver and time. Compare sources and check the authoritative zone, cachin...
Why is a record missing?
DNS lookup reports an answer from a particular resolver and time. Compare sources and check the authoritative zone, cachin...
How long does DNS change take?
DNS lookup reports an answer from a particular resolver and time. Compare sources and check the authoritative zone, cachin...