DNS Lookup Tool
Check DNS records for any domain. Look up A, CNAME, MX, TXT, NS, and other DNS record types online.
About this calculator
Enter a domain and choose a record type to see its DNS records: A, AAAA, CNAME, MX, NS or TXT. Useful for checking email setup, verifying DNS changes and troubleshooting site problems.
Results come from public DNS-over-HTTPS resolvers.
How to use it
- Enter the domain.
- Choose the record type.
- Press Lookup.
DNS record types
A maps a name to an IPv4 address, AAAA to IPv6. CNAME is an alias to another name. MX lists mail servers with priorities (lower number is tried first). NS lists the authoritative name servers. TXT holds free text, used for SPF, DKIM, DMARC and domain-verification tokens. Each record has a TTL (seconds) that sets how long resolvers cache it, so changes can take up to the TTL to spread.
Worked example
Typical records
| A | example.com → 93.184.216.34 |
| MX | 10 mail.example.com |
| TXT | v=spf1 include:_spf.google.com ~all |
Tips and common mistakes
- Lower the TTL a day before a planned DNS change.
- Use TXT records for SPF and DMARC to improve email delivery.
- A CNAME cannot sit at the root of a domain.
- Propagation can take minutes to hours.
- Check both www and the bare domain.
Frequently asked questions
What is DNS?
The system that turns domain names into IP addresses.
What is an MX record?
It tells senders which servers receive your email.
What is TTL?
How long a record is cached.
Why is my DNS change not showing?
Caches hold the old value until TTL expires.
What is a TXT record used for?
SPF, DKIM, DMARC and verification.
Is it free?
Yes.