DNS Records Lookup
Query public DNS records and review answers and TTLs.
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Domains, DNS & Security Tools
Find the right free tool, open its page, and get started.
10 matching tools
WHOIS and Domain Registration Lookup
Look up public domain registration data using RDAP.
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SPF, DKIM and DMARC Checker
Inspect public email authentication DNS records.
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SSL Certificate and Expiry Checker
Inspect a public HTTPS certificate and expiry date.
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DNS Propagation Checker
Compare current DNS answers from Google and Cloudflare resolvers.
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Reverse DNS Lookup
Find PTR hostnames and check their forward DNS.
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HTTP Security Headers Checker
Review HTTP security headers on public webpages.
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IP and ASN Lookup
Find the network prefix and announcing ASNs for an IP address.
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IP Geolocation Lookup
See provider-estimated location details for a public IP address.
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Email Header Analyzer
Inspect email routing and claimed authentication results locally.
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