DNS Lookup
Query public DNS for any domain and record type, handy for checking a change has gone live.
Dieser Inhalt ist auf Englisch.
Durchgerechnete Beispiele
Looking up a website address record
example.com with the A record type selected
A 192.0.2.10 (TTL 3600 seconds). The value is the IPv4 address that the domain currently points to.
Results reflect what the wider internet sees now, and a recent change can take up to the record's TTL to appear everywhere.
Checking where mail is delivered
example.com with the MX record type selected
MX 10 mail.example.com. A lower number means the server is tried first.
This is an illustrative record; if a domain returns no MX records, mail sent to it is unlikely to arrive.
Über DNS Lookup
A DNS lookup shows the records that tell the internet where a domain's services live. A records point to IPv4 addresses, AAAA records point to IPv6 addresses, and CNAME records alias one name to another. This tool also returns MX records for email routing, TXT records for verification and policies, NS records for the authoritative name servers, SOA for zone details and CAA for certificate authority rules.
DNS lookups are most useful when you are checking a change. After you update a record, the new value can take up to the record's TTL, or time to live, to appear as resolvers refresh their caches. Comparing the live answer with what you expect helps you confirm a migration, troubleshoot email delivery or check that a verification record has published.
So verwenden Sie DNS Lookup
- Type the domain name, such as example.com, without http:// or a path.
- Select the record types you need, or check them all.
- Read the values returned for each record type.
- Compare the results with the settings in your DNS provider's control panel.
- If a recent change has not appeared, wait for the TTL to pass and look up again.
Typische Einsatzzwecke
- Checking that MX records point to the right mail servers after a provider change
- Confirming a TXT record for domain verification has published
- Finding which name servers are authoritative for a domain
- Checking CAA records before ordering a new certificate
Häufige Fragen
How long do DNS changes take to show up?
DNS changes can take up to the record's TTL, the time to live in seconds, to appear everywhere. Resolvers cache answers for that period, so some people see the new record sooner than others. Lowering the TTL before a planned change can shorten the wait, but the old value stays cached until its previous TTL expires.
What is the difference between an A record and a CNAME record?
An A record maps a name directly to an IPv4 address, while a CNAME record maps a name to another name, which is then resolved to an address. CNAMEs are often used for subdomains that point to a hosting service. A name with a CNAME generally cannot have other record types alongside it, so the bare domain usually needs A or AAAA records instead.
What do MX records do?
MX records tell mail servers which hosts accept email for a domain, and each one carries a priority number. Lower numbers are tried first, and higher numbers act as fallbacks. If MX records are missing or wrong, email sent to that domain may bounce or never arrive. Check them after changing email providers.
Why would I check CAA records?
CAA records state which certificate authorities are allowed to issue certificates for a domain. If a CAA record exists and does not list the authority you are using, that authority should refuse the request. Checking CAA before ordering or renewing a certificate can save a failed attempt and confirm your policy is in place.
Can DNS lookup show which host a website uses?
Often you can get useful clues. NS records show the name servers that manage the domain's DNS, A records show the IP address the site uses, and CNAME records may point to a hosting platform. These hints suggest where a site is hosted but do not prove it, because many services share addresses and use third-party names.