DNS Lookup — A, MX, TXT, NS Records Checker

What is a DNS lookup?

A DNS lookup asks the Domain Name System for the records attached to a domain — the data that makes the internet route to the right place. An A record maps the name to an IPv4 address (AAAA to IPv6), MX records point mail to the right servers, NS records name the domain’s authoritative nameservers, TXT records hold verification and policy data like SPF and DKIM, and CNAME aliases one name to another. This tool queries all of them at once so you can see exactly how a domain is configured.

FAQ

What is the difference between A, MX, NS and TXT records?

An A record is the address of a website (its IPv4). MX records tell other mail servers where to deliver email for the domain. NS records list the authoritative nameservers that answer for the zone. TXT records store free-form text used for things like SPF, DKIM and domain-ownership verification.

Why don’t my new DNS records show up yet?

DNS changes propagate gradually because resolvers cache records for the length of their TTL. A new or edited record can take from a few minutes to 24–48 hours to be visible everywhere. If you just made a change, wait for the TTL to expire and check again.

How do I check my SPF or DKIM record?

Both live in TXT records. Look them up here and read the TXT values: an SPF record starts with “v=spf1”, and a DKIM record is a TXT entry on a selector subdomain (like selector._domainkey.yourdomain.com). Correct SPF and DKIM are what keep your mail out of spam.

Is a DNS lookup the same as a WHOIS lookup?

No. A DNS lookup returns the technical records that route traffic (A, MX, NS, TXT…). WHOIS returns registration and ownership data for the domain or an IP block — who registered it, when, and the responsible contacts. This site has both.