About
Free network tools for webmasters and administrators
QuickLookup is a free suite of online tools for diagnosing domains, DNS, SSL certificates and HTTP responses. No sign-up, no installation, no fees.
Available tools
My IP Address
Find your public IP address, IP version, reverse DNS and the details every website can see about you.
Ping
Test server availability and network latency with ICMP ping or a TCP connection to port 443 or 80.
DNS Lookup
View a domain's DNS records: A, AAAA, CNAME, MX, NS, TXT, SOA and CAA. For an IP address you get the reverse PTR record.
WHOIS Lookup
Find a domain's registrar, registration and expiry dates, status, name servers and DNSSEC.
DMARC Lookup
Check a domain's DMARC record: policy for unauthenticated e-mails, reports, alignment and common configuration mistakes.
SSL Checker
Verify a website's SSL/TLS certificate: validity, issuer, certificate chain, TLS version and domain match.
HTTP Headers & Redirects
View the server's HTTP response headers, status codes and the full redirect chain including response times.
Security Headers
Grade a website's security HTTP headers from A+ to F: HSTS, CSP, X-Frame-Options, Referrer-Policy and more.
Why QuickLookup exists
When launching a website or troubleshooting an outage you need to quickly verify DNS records, certificate validity or redirects. QuickLookup puts this information in one place, clearly and without dark patterns.
Technology
Nuxt 4, Vue 3, TailwindCSS, Node.js. DNS, RDAP and target server queries are made by our server - we do not store the addresses you enter.
Contact
Email: quicktools@post.cz
Sister Projects
Discover more free tools from the Quick family.