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Fast, private network tools: IP geolocation, DNS checks, WHOIS, DNS propagation, traceroute, security analysis and more. No ads, no signup.
DNS Lookup
Query A, AAAA, MX, TXT, NS, SOA, CNAME, CAA and SRV records from authoritative resolvers.
Mail Check
Domain mail posture: MX, SPF, DKIM selector probe, DMARC.
DKIM Check
Find a domain's DKIM selectors automatically, or check one you already know.
DNS Propagation
Query a record from probes in several countries at once and see whether they agree.
New
Email Header Analyzer
Paste raw headers: route with delays, SPF, DKIM, DMARC, likely origin and a plain verdict.