All tools

Complete report on any domain: WHOIS, DNS, hosting, SSL, speed, technology and safety.

Look up the registrar, registration and expiry dates, status codes and name servers of any domain using RDAP.

Find the exact age of any domain from its registration date in years, months and days.

Check the expiry date of a domain, the days left before it expires and its status.

Check whether a domain name is already registered or likely available to buy.

Check the SSL certificate of a website: issuer, validity, days left, covered domains, protocol and full chain.

View all HTTP response headers of a website and check which security headers are present.

Trace every redirect of a URL with status codes and response time to find loops and slow hops.

Find the CMS, framework, ecommerce platform, analytics, payment and other technology a website uses.

Check if a website is down for everyone or just you, with the live status code and response time.

Find websites that share the same Google Analytics, Tag Manager, AdSense or Facebook Pixel ID.

Find all DNS records of a domain in one place: A, AAAA, MX, NS, TXT, CNAME, SOA and CAA.

See the mail servers of a domain with their priority and the email provider behind them.

Find the authoritative name servers of a domain and the DNS provider that hosts them.

View all TXT records of a domain, including SPF, site verification and other policy records.

Check where a hostname points with its CNAME record, useful for CDN, email and SaaS setups.

Read the SOA record of a domain: primary name server, admin contact, serial and timers.

See which certificate authorities are allowed to issue SSL certificates for a domain.

Check whether a DNS change has reached major public resolvers like Google, Cloudflare and Quad9.

Test whether a domain is protected with DNSSEC and view its DS records.

Find the PTR hostname of any IPv4 or IPv6 address along with its network and country.

Find the IPv4 and IPv6 addresses of a hostname with TTL and the network that owns them.

See your public IP address instantly with your ISP, network, country and reverse DNS.

Look up any IP address or domain to find its owner network, ASN, IP range, country and hostname.

Find other websites hosted on the same IP address from our database of scanned domains.

Look up an autonomous system number to see its owner, country and announced IPv4 and IPv6 prefixes.

Calculate network address, broadcast, usable host range, netmask and wildcard for any IPv4 CIDR block.

Check if an IP address or mail server is listed on popular DNS based spam blacklists.

Check the SPF record of a domain, count DNS lookups and spot common mistakes that hurt email delivery.

Check the DMARC record of a domain and see its policy, reporting addresses and alignment settings.

Find DKIM records for common selectors or check a specific selector for any domain.

Get an email security score for a domain based on SPF, DMARC, DKIM, MTA-STS, TLS-RPT and BIMI.

Create a correct SPF record in seconds by selecting the services that send email for your domain.

Create a DMARC record with the right policy, reporting address and alignment for your domain.