DNS Lookup
A, AAAA, MX, NS, TXT, CNAME, SOA and CAA records of a domain.
How to use the DNS lookup
- Enter a domain name such as
example.com(a full URL also works; the tool takes the host name from it). - Choose All records or a single record type.
- Press Look up DNS. Results come live from public DNS resolvers, not from a cache we keep.
DNS record types
| Type | What it does | Example value |
|---|---|---|
| A | Points a name to an IPv4 address | 203.0.113.10 |
| AAAA | Points a name to an IPv6 address | 2001:db8::10 |
| CNAME | Makes one name an alias of another | shop.example.com → example.myshopify.com |
| MX | Names the mail servers for the domain, with priorities | 10 mail.example.com |
| NS | Names the authoritative name servers | ns1.example-dns.com |
| TXT | Free text, used for SPF, DKIM, DMARC and site verification | v=spf1 include:_spf.google.com ~all |
| SOA | Start of authority: primary server, contact and timers | ns1.example.com hostmaster.example.com 2026102001 … |
| CAA | Which certificate authorities may issue SSL certificates | 0 issue "letsencrypt.org" |
Read DNS record types explained for more detail and examples.
Common uses
- Check a migration: confirm that the A and AAAA records point to your new server.
- Fix email delivery: confirm MX records and the SPF, DKIM and DMARC TXT records.
- Verify a domain: check that a verification TXT record for Google, Microsoft or another service is published.
- Troubleshoot SSL: make sure a CAA record does not block your certificate authority.
Frequently asked questions
Why do I see an old value after changing a record?
Resolvers cache records for as long as the record's TTL (time to live) says. After a change, the old value can be served until the TTL runs out. Lower the TTL before planned changes.
Why are there several A records?
Large sites spread traffic across several servers, so one name can have many addresses. Content delivery networks may also return different addresses depending on where you are.
What does "No records found" mean?
The domain exists but has no record of that type, or the domain does not exist at all. Check the spelling and try "All records".
Learn more
Common port numbers and what they are used for
A reference list of the most common TCP and UDP port numbers, from 22 SSH and 443 HTTPS to 3389 RDP, with what each one does and which ones to keep closed.
DNS & domains · 2 min readHow to change your DNS server on any device
Step-by-step instructions to change your DNS server to 1.1.1.1, 8.8.8.8 or another resolver on Windows, macOS, iPhone, Android and your router.
DNS & domains · 2 min readHow to find the IP address of a website
Find the IP address behind any website with an online lookup, ping or nslookup, and learn why big sites have many addresses that change by location.
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