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Free network tools
Speed test, IP lookup, DNS, WHOIS, blacklist check, VoIP bandwidth and subnet calculators — right in your browser.
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Measured from your browser to the nearest Cloudflare edge; results reflect your connection, not our servers.
Enter a domain to inspect its DNS records.
Registrar, dates, status and name servers via RDAP.
Checks the address against popular DNS-based spam blocklists.
Figures assume IPv4 Ethernet, 20 ms packetisation. Real needs vary — ask our team to size your platform.