The Domain Name System (DNS) is the internet's phonebook. It translates human-readable domain names into IP addresses and stores records for mail servers, security policies, and more.

What DNS record types can I look up?

This tool retrieves common record types including A, AAAA, MX, NS, TXT, SOA, CNAME, SRV, CAA, PTR, DS, and DNSKEY from the public resolver you select.

What is DNS propagation?

DNS propagation is how updated records appear across resolvers worldwide. This page checks 16 global resolvers so you can spot regional delays or discrepancies after a DNS change.

What does WHOIS show?

WHOIS/RDAP lookup returns registration metadata such as registrar, creation and expiry dates, name servers, and status codes from the authoritative registry for that TLD.

What does the SSL/TLS inspector show?

It inspects the domain's TLS certificate and shows a security grade (A+–F), validity window, SAN list, key usage, and OCSP/CA issuer details.

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DNS / WHOIS / SSL Lookup

Look up DNS records, WHOIS registration data, and SSL/TLS certificate details for any domain. Free domain analysis tool - no sign-up required.

DNS Record Types

A - IPv4 address mapping
AAAA - IPv6 address mapping
CNAME - Canonical name (alias)
MX - Mail exchange servers
NS - Name servers (authoritative)
TXT - Text records (SPF, DKIM, verification)
SOA - Start of authority
CAA - Certificate authority authorization
DS / DNSKEY - DNSSEC signing records

DNS Resolvers

Query from Google (8.8.8.8), Cloudflare (1.1.1.1), Quad9 (9.9.9.9), or OpenDNS (208.67.222.222) to compare results across major public resolvers.

WHOIS / RDAP Lookup

Retrieves domain registration data including registrar, registration and expiry dates, name servers, and registrant contact info via IANA RDAP bootstrap (authoritative registry for each TLD).

SSL / TLS Certificate Check

Inspects the TLS certificate for any domain: subject, issuer, validity period, days remaining, fingerprint, and TLS version support (TLS 1.0 through 1.3).

Frequently Asked Questions

What is DNS?: The Domain Name System (DNS) is the internet's phonebook. It translates human-readable domain names into IP addresses and stores records for mail servers, security policies, and more.
What DNS record types can I look up?: This tool retrieves common record types including A, AAAA, MX, NS, TXT, SOA, CNAME, SRV, CAA, PTR, DS, and DNSKEY from the public resolver you select.
What is DNS propagation?: DNS propagation is how updated records appear across resolvers worldwide. This page checks 16 global resolvers so you can spot regional delays or discrepancies after a DNS change.
What does WHOIS show?: WHOIS/RDAP lookup returns registration metadata such as registrar, creation and expiry dates, name servers, and status codes from the authoritative registry for that TLD.
What does the SSL/TLS inspector show?: It inspects the domain's TLS certificate and shows a security grade (A+–F), validity window, SAN list, key usage, and OCSP/CA issuer details.