Your own public IP address shows at the top of the tool as soon as the page loads. An IP address lookup tells you where an IP address or a website is hosted. Enter an IPv4 address or a domain and this tool returns the IP address, its reverse DNS name, the city, region and country the address is registered to, and the network (ASN) and organisation that run it. It is free and needs no signup.
How to use the IP address lookup
- 1Type an IPv4 address such as 1.1.1.1, or a domain such as example.com. You can paste a full URL; the tool keeps just the domain.
- 2Press Check, or hit Enter.
- 3Read the five rows: IP address, Reverse DNS, Location, Network (ASN) and Organization. A dash means that source had no value.
- 4Press Copy link to this result to share it. Anyone who opens the link sees the lookup run again.
When to use it
- You want to know which company hosts a website, for a migration, a support request or an abuse report.
- An IP keeps showing up in your server logs or analytics and you want to know whose network it is.
- You changed hosting and want to confirm the domain now points to the new server.
- You are checking whether a site sits behind a CDN such as Cloudflare.
Worked examples
Looking up a website
We entered our own domain.
- URL to check
- searchblueprint.io
- IP address
- 216.150.1.65
- Reverse DNS
- -
- Location
- Walnut, California, US
- Network (ASN)
- AS16509
- Organization
- Amazon.com, Inc.
The domain resolves to an address on Amazon's network (AS16509), placed in California. That is where the server answers from, not where the business sits. No reverse DNS name is set, which is normal for cloud hosting.
Looking up an IP address
We entered a well-known public DNS resolver.
- URL to check
- 1.1.1.1
- IP address
- 1.1.1.1
- Reverse DNS
- one.one.one.one
- Location
- Brisbane, Queensland, AU
- Network (ASN)
- AS13335
- Organization
- Cloudflare, Inc.
The reverse DNS name and the ASN both point to Cloudflare. The location is where the address is registered; Cloudflare answers on this address from many cities at once, so treat the city as a label, not a map pin.
What each row means
- IP address: the address the domain resolves to. For a domain, the tool shows the first address the DNS lookup returns.
- Reverse DNS: the hostname the address points back to, if its owner set one.
- Location: city, region and country code from IP geolocation data. It describes the address, not a person or an office.
- Network (ASN): the autonomous system number of the network that announces the address.
- Organization: the company that runs that network, usually a host, a cloud provider or an internet provider.
Made by SearchBlueprint
This lookup is free with no signup. SearchBlueprint, who make it, sell SEO planning for websites: which searches each page should answer.
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