DNS Lookup
Enter a domain to see where it points, which servers handle its email and which name servers control it. Choose one record type, or show all the common ones at once.
When you press the button, your browser sends the domain you typed to Cloudflare’s public DNS-over-HTTPS service (with Google’s as a backup) and shows the answer. CHECKiOX does not see or store it. See our privacy policy.
What the record types mean
- A: the IPv4 address a domain points to. This is where its website is hosted.
- AAAA: the IPv6 address, if the domain has one.
- CNAME: an alias that says “this name is another name”. Many services use it, for example
wwwpointing to the main site. - MX: the servers that receive the domain’s email, with a priority. The lowest number is tried first.
- NS: the name servers that hold the domain’s records.
- TXT: free text used for email security (SPF, DKIM, DMARC) and to prove you own a domain to services such as Google and Microsoft.
- CAA: which certificate authorities may issue certificates for the domain.
Common uses
- Checking a change you made. After editing DNS at your provider, look the record up here to see whether the new value is live.
- Fixing email problems. Look at MX and TXT records, or use the SPF, DKIM and DMARC checker for a plain-English review.
- Moving a website. The A or AAAA record tells you which server a domain currently points to.
- Checking a certificate setup. The CAA record limits who can issue certificates; check the certificate itself with the SSL certificate checker.
Why a change does not show up immediately
Each record has a TTL (time to live), the number of seconds resolvers may keep the old answer. Changes can take up to that long to reach everyone. The lookup here shows what a large public resolver currently returns, which can differ from what your own provider’s servers return for a short while.
About this tool
The lookup runs from your browser to a public resolver, so it shows what the public sees, not private or internal records. If you want to compare how quickly resolvers answer from your connection, use the DNS speed test.
Frequently asked questions
How do I look up the DNS records of a domain?
Enter the domain in the box above, choose a record type or leave it on all common records, and press Look up.
What is an MX record?
An MX record names the mail servers that receive email for a domain, each with a priority number. Mail goes to the lowest number first.
What is a TXT record used for?
TXT records hold text that other systems read, most often email security settings such as SPF, DKIM and DMARC, and verification codes for services like Google and Microsoft.
Why does my DNS change not show up yet?
Resolvers keep old answers for the record's TTL. A change can take up to that long to spread. Check the TTL shown with each record.
Does the lookup show private or internal DNS?
No. It queries a public resolver, so it only shows records the public internet can see.
Related tools and guides
- SPF, DKIM and DMARC checker: review your email records.
- DNS speed test: compare public resolvers.
- SSL certificate checker: check a site's certificate.
- Is it down? Website checker: does a site answer.