Domain and IP lookup
Enter a domain or an IP address to see its DNS records, SPF and DMARC policies, registration details, and who runs the network.
Where your data goes
This tool needs outside services. What you type stays in your browser until you press Look up. Then your browser sends it to:
Cloudflare's DNS resolver cloudflare-dns.com
The domain or IP address, as DNS questions (A, MX, TXT, PTR, and others). The resolver then asks the domain's own name servers.
rdap.org rdap.org
The registered domain or the IP address. It redirects your browser to the registry that holds the record, such as Verisign for .com or ARIN for many U.S. networks, and that registry receives the same query.
Team Cymru's IP-to-ASN service asn.cymru.com
The IP address, as a DNS question that goes through Cloudflare's resolver, to find the network that announces it.
Cloudflare, rdap.org, and the registry see your IP address and browser details, as with any web request. Team Cymru gets its question from Cloudflare's resolver, not from your browser. What you look up is also kept in the page address after the # sign so you can share it; that part isn't sent to this site.
This site never receives your lookups and keeps no record of them. Each service handles requests under its own privacy policy.