Whois Lookup

Look up registration and network details for any IP address or domain — country, city, ISP, organisation, ASN and timezone — in one place.

Whois Lookup
Enter an IP address or domain above to run a Whois lookup.

What the Whois Lookup does

Whois reveals the public registration and network information behind an IP address or domain. For an IP, that means the owning organisation, the ISP, the Autonomous System Number (ASN) that routes it, and the geographic region it is registered to.

This tool returns a clean, readable summary of that data so you can quickly identify who operates an address, what network it belongs to, and roughly where it sits — useful for security triage, research, and verifying an IP before you trust or block it.

How to read the results

  • ISP / Org — the provider and organisation that own or operate the address block.
  • ASN — the Autonomous System Number; a network's unique ID in global routing (e.g. AS13335 is Cloudflare).
  • Country / Region / City — where the block is registered (an estimate, not GPS).
  • Timezone & coordinates — the approximate locale tied to the registration.

Worked example

Input: 1.1.1.1

IP          1.1.1.1
Country     Australia (AU)
ISP         Cloudflare, Inc.
ASN         AS13335

1.1.1.1 is Cloudflare's public DNS resolver. The registration shows Cloudflare as the org and AS13335 as the routing network — the ASN is the most reliable identifier here, since the geographic point is only nominal for an anycast address.

Common use cases

  • Identify who owns a suspicious IP from your firewall or server logs.
  • Check the hosting provider and ASN behind a website.
  • Verify an IP's country before applying geo-rules or blocks.
  • Research network ownership for abuse reports or due diligence.

Whois Lookup — Frequently Asked Questions

What is an ASN and why is it useful?▾

An Autonomous System Number (ASN) uniquely identifies a network on the internet for routing purposes. Because it is far more stable than a geographic guess, the ASN is the most reliable way to attribute an IP to an operator — for example AS15169 is Google and AS13335 is Cloudflare.

Is IP Whois location accurate?▾

It reflects where an address block is registered, which is usually the right country and often the right city — but it is an estimate, not a GPS fix. VPNs, anycast, and large ISPs that register blocks centrally can all shift the reported location away from a device's true position.

What is the difference between IP Whois and domain Whois?▾

IP Whois returns the network operator, ASN and registration region for an address. Domain Whois returns registrar and registrant details for a domain name. This tool focuses on IP and geolocation intelligence for both IPs and the addresses that domains resolve to.

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