Free DNS Checker | Lookup A, MX, NS, TXT, CNAME & PTR Records

Authoritative answers

See name, type, TTL, and rdata from live resolvers. Use this when a site, mail flow, or certificate issuance depends on the current zone.

Check NS records

Mail authentication

Confirm MX hosts, SPF mechanisms, and DMARC policy before you cut over email or debug quarantine.

Open MX lookup

Propagation compare

Compare Cloudflare, Google, and NextDNS in one view after a nameserver or record change.

Open propagation checker

How this DNS checker works

Enter a hostname or IPv4 address and choose a record type. The browser first asks the origin PHP resolver on Hostinger. If that path is unavailable, the client falls back to DNS over HTTPS at Cloudflare, then can compare Google Public DNS and NextDNS.

A records map a name to IPv4. AAAA maps to IPv6. CNAME aliases one name to another. MX lists mail exchangers and preference. NS lists delegated nameservers. TXT carries SPF, DKIM, DMARC, and domain proofs. SOA holds zone serial data. CAA limits certificate authorities. PTR performs reverse DNS.

When to use a live lookup

After changing nameservers at a registrar or Cloudflare.
When a CDN, SaaS, or mailbox provider asks you to publish a verification TXT record.
To confirm TTL before a cutover so you know how long old answers can linger.
To inspect reverse PTR on mail servers that require matching forward and reverse names.

DNS checker FAQ

What is a DNS checker?

A DNS checker queries public resolvers for records such as A, AAAA, MX, NS, TXT, CNAME, SOA, CAA, and PTR so you can verify what the internet currently publishes for a hostname.

Which DNS record types can I look up?

This tool looks up A, AAAA, CNAME, MX, NS, TXT, SOA, CAA, and PTR records, plus dedicated SPF and DMARC TXT checks.

Does this DNS checker use Cloudflare?

Yes. dnschecker.sd9.in is routed through Cloudflare and queries Cloudflare DNS over HTTPS, with Google and NextDNS as comparison resolvers.

Is the DNS lookup free?

Yes. Record lookup, reverse PTR, mail authentication checks, and resolver comparison are free and do not require an account.