Domain tools answer the practical questions that come up when you run a website, move it, buy a domain or research another site. Each tool here reads public data, such as registry records, DNS answers, the certificate a server presents or a public link graph, and explains the result in plain language.
Which tool to use
- WHOIS Lookup shows a domain's registrar, registration and expiry dates, status codes, nameservers and DNSSEC. It queries the registry's RDAP service and falls back to classic WHOIS where RDAP is not available.
- Domain Age Checker shows when the current registration was created and its exact age in years, months and days, along with the expiry date.
- DNS Lookup checks A, AAAA, CNAME, MX, NS, TXT, SOA and CAA records with their TTLs, and highlights SPF and DMARC email settings.
- SSL Checker tells you whether a site's certificate is trusted, covers the hostname and when it expires, and shows the issuer, SANs, chain and TLS version.
- Domain Authority Checker scores up to 20 domains at once with the NewBacklink Domain Score, a transparent 0-100 estimate calculated from Common Crawl's public web graph. Like every third-party authority metric, it is an outside estimate, not a Google measure.
Common workflows
Moving a site to new hosting. Confirm the nameservers in the WHOIS Lookup, check that the A and AAAA records in the DNS Lookup point to the new server, then run the SSL Checker to make sure the new server presents a valid certificate.
Fixing email delivery. Use the DNS Lookup to check your MX records, make sure you have exactly one SPF record, and review your DMARC policy.
Evaluating a domain to buy or a link prospect. Check its registration date with the Domain Age Checker, its status codes with the WHOIS Lookup and its position in the link graph with the Domain Authority Checker. Then review the site itself, because no single number tells you about content quality.
Frequently asked questions
Are these domain tools free?
Yes. All of the domain tools are free to use.
Why do my results not show a change I just made?
Results are cached for a period that depends on the tool, and DNS changes also take time to spread because resolvers cache records for the length of their TTL. Check again a little later.
Can these tools tell me who owns a domain?
Only when the registry publishes the registrant's details. Most registries and registrars redact personal contact information, so the owner often cannot be identified from registration data alone.