IP Address Lookup
An IP address lookup tool resolves an IP address or autonomous system (AS) number into its geolocation, internet service provider, and network registry details — the same public routing data used to verify where traffic is really coming from. Wondering "what is my IP address"? It's shown automatically below, or enter any other IP or AS number to see the full picture instantly.
What is my IP address?
1 Look up an IP or AS number
Sends the IP address (or, if left blank, your own apparent IP) to a network registry to resolve geolocation and network details — nothing is stored beyond a short-lived cache.
Queries a public routing registry for AS number data — nothing is stored beyond a short-lived cache.
2 Results
What an IP or ASN lookup is actually useful for
Every device on the internet connects through an IP address, and every IP address belongs to a network registered under an autonomous system number — an ISP, a hosting provider, a company's own infrastructure. Looking up either one answers a question that comes up constantly in web and SEO work: is this traffic, this visitor, or this crawler really coming from where it claims to be?
That matters for spotting spoofed bot traffic (a request claiming to be Googlebot but arriving from an unrelated hosting provider), understanding a competitor's or a client's hosting/CDN setup, diagnosing geo-targeting or geo-blocking issues, and general network troubleshooting — all without needing command-line whois or a paid API. Reading response headers on a specific request instead of the network behind it? The HTTP Header Checker covers that side.
For example, looking up 8.8.8.8 returns:
IP: 8.8.8.8
Country: United States (US)
Region/City: California, San Jose
ISP / Org: Google LLC
ASN: AS15169 (GOOGLE - Google LLC)— confirming that address genuinely belongs to Google's own network, not a third party spoofing it.
How to use this tool
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1
Choose the lookup type
Select IP Address to look up a single address, or AS Number to look up a whole network.
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2
Enter the value
Type an IPv4 or IPv6 address, or an AS number such as 15169 or AS15169. Leave the IP field blank to look up your own public IP.
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3
Run the lookup
Click "Look up". The query is sent to public network registries through our server.
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4
Read the results
An IP lookup shows its approximate location, the organization or ISP that holds it and its ASN. An ASN lookup shows the network's owner and the IP ranges it announces.
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5
Copy the results
Click "Copy results" to keep them for a report or support ticket.
Common use cases
- Checking whether a visitor in your server logs that claims to be Googlebot really comes from Google's network.
- Finding out which hosting company or CDN a website runs on.
- Investigating suspicious log entries, spam form submissions or repeated login attempts.
- Seeing which IP address and country your VPN or proxy presents to websites.
- Diagnosing why visitors in one region see the wrong language, currency or content.
Tips and common mistakes
- Treat city-level results as estimates. Mobile and corporate networks often geolocate to their provider's hub, which can be hundreds of kilometres from the real user.
- Confirm crawlers with DNS as well. A matching ASN is a strong clue, but Google's official check is a reverse DNS lookup to googlebot.com or google.com, followed by a forward lookup back to the same IP.
- The tool takes IPs, not domain names. To look up a website, find its IP first with a command such as
nslookup example.com, keeping in mind that a site behind a CDN shows the CDN's network. - Go one layer up. Once you know who hosts a site, the HTTP Header Checker shows what its server sends back, and the Redirect Chain Checker shows where its URLs lead. The IP addresses, ASNs and geolocation guide explains how this data is collected.
Frequently asked questions
The "Your IP address is" box at the top of this page shows it automatically, as soon as the page loads — no typing or clicking needed. That's your public IP address: the one websites and servers see when your device connects to them, not a private/local network address like 192.168.x.x. Click "See full details" underneath it to also see its geolocation, ISP and ASN.
For an IP address: its approximate geolocation (country, region, city), the ISP or hosting provider, and the autonomous system (ASN) that network belongs to. For an AS number: the organization it's registered to and the IP ranges (prefixes) that network currently announces. It doesn't show a person's name, street address, or anything tied to an individual — IP geolocation only ever resolves to the ISP or organization, not the specific person using it.
An Autonomous System Number identifies a single network operator on the internet — an ISP, a cloud provider, a university, a company — that controls how traffic gets routed to and from its own IP ranges. Google's AS15169, for example, covers a huge block of IPs used by Google's services. Looking up the ASN behind an IP tells you who actually operates that network, which is more reliable than the organization name alone (that can be outdated or generic).
Country-level accuracy is generally reliable. City-level is a best estimate — it's often correct for home broadband connections, but can be off for mobile networks, VPNs, corporate networks, and cloud/hosting IPs, since those often report the location of a data center or a carrier's routing hub rather than the actual device.
It's a solid first check — a real Googlebot request comes from an IP whose ASN resolves to Google (AS15169 or a small number of others Google owns), not a random hosting provider. It's not a complete verification on its own (Google's official method is a reverse-DNS + forward-DNS lookup), but a mismatched ASN is an immediate red flag that it's a spoofed user agent.
No. What you enter — or your own apparent IP, if you leave the field blank — is sent to third-party network registries to run the actual lookup, since no browser can query those registries directly. Results are cached on our server for up to 30 minutes to avoid repeat lookups, but nothing is tied to your identity or kept beyond that window.
Yes, completely free with no signup, no rate-limited account tier, and no API key to manage.
Cross-references IP geolocation with the AS number that actually announces it — the same sanity check used when verifying a claimed crawler or diagnosing a hosting/CDN setup during a technical SEO audit, not just a raw geolocation lookup.
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