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About the Domain & IP Lookup

Enter a domain or IP address and get a complete report in one pass: registration details, DNS records, hosting location, certificate status and HTTP response headers.

• One query returns DNS, Whois, geolocation and TLS detail
• Works with domains, IPv4 and IPv6 addresses
• A fast first step when diagnosing any site problem

Frequently asked questions

What can I learn from a domain lookup?

Who registered the domain and when it expires, which nameservers and mail servers it uses, where it is hosted, and whether its certificate is valid.

Does this work for IP addresses too?

Yes. Enter an IP to see its owner, network range, geolocation and reverse DNS name.

Related tools

• Whois LookupLook up domain registration details: registrar, creation and expiry dates, nameservers and status codes. Whois lookup, no signup.
• ASN LookupLook up any autonomous system number to see its operator, announced prefixes and peers. BGP and routing information.
• DNS LookupLook up DNS records for any domain: A, AAAA, MX, TXT, CNAME, NS, SOA and more. DNS lookup with instant results.
• ISP LookupIdentify the ISP, hosting company or organisation that owns any IP address, plus its network range. Instant.
• NSLookupRun nslookup from your browser to resolve domains and check DNS records. Simple, fast and no install required.
• RDAP LookupQuery RDAP for structured domain and IP registration data — the modern replacement for Whois. Instant, standards-compliant.

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