NetToolkit.eu

DNS Record Checker

Look up all DNS records for any domain in a single query: A, AAAA, MX, TXT, CNAME, NS, SOA and PTR.

DNS Bulk Lookup

Check DNS records for multiple domains at once. Supports A, AAAA, MX, TXT, CNAME, NS and SOA records.

DNS Propagation Checker

Check if your DNS changes have propagated across 22+ global DNS servers with an interactive world map.

SPF Record Checker

Validate SPF records, count DNS lookups, analyze mechanisms and get recommendations to prevent spoofing.

DMARC Checker

Analyze DMARC policy, alignment settings, and reporting configuration. Get a strength rating.

HTTP Headers Checker

Inspect HTTP response headers for any website. Check security headers, caching, redirects and server info.

SSL Certificate Checker

Inspect SSL/TLS certificates: issuer, validity, SANs, key type, signature algorithm and certificate chain.

Whois Lookup

Look up domain registration information: registrar, creation date, expiry date, name servers and more.

Bulk Whois Lookup

Look up WHOIS data for up to 100 domains at once. Find registrar, expiry dates, and export as CSV.

What Is My IP

See your public IPv4 and IPv6 addresses, reverse DNS hostnames and approximate location on an interactive map.

Security Headers Checker

Get a letter grade (A+ to F) for your website's security headers. Check HSTS, CSP, X-Frame-Options and more.