IP lookup

What is an IP address?

An IP address is a numeric identifier assigned to every device connected to the internet. It functions like a postal address for your computer, phone, or server—when you visit a website or send data across the internet, your IP address tells the destination where to send the response back to you.

The two main versions are IPv4 and IPv6. IPv4 addresses consist of four numbers separated by periods, like 192.168.1.1 or 8.8.8.8. Each number ranges from 0 to 255, creating about 4.3 billion possible combinations. IPv6 addresses are longer and use hexadecimal notation to provide vastly more addresses as the internet expands. Most public IP addresses you'll lookup are IPv4.

Your public IP address is visible to every website you visit. It is assigned by your Internet Service Provider and is used to route traffic across the global internet. Private IP addresses like 192.168.x.x or 10.x.x.x work only within local networks and are never routed on the public internet. When you use this tool to lookup an address, you are inspecting public IP space.

ISPs allocate IP addresses from Regional Internet Registries (RIRs) such as APNIC, ARIN, LACNIC, RIPENCC, and AFRINIC. These registries maintain records of which company owns each IP address block, when it was allocated, and what country it is registered to. Lookup tools access these registration databases to return geolocation and organizational information.

How to look up an IP address or domain

This tool accepts three input formats: a standalone IP address (8.8.8.8), a domain name (example.com), or a full URL (https://example.com). When you enter a domain or URL, the tool first resolves it to its IP address, then performs the geolocation and network lookup on that resolved address.

1. 1Enter an IP address like 1.1.1.1 or a domain like example.com in the input field
2. 2Click the submit button to send the lookup request
3. 3The tool queries geolocation databases and whois registries for that IP
4. 4Results display the country, city, ISP, ASN, and reverse DNS hostname
5. 5Copy individual fields to your clipboard using the copy button next to each data point

The lookup runs instantly—most queries return results in under one second. The tool does not perform a network scan or crawl of the target address. It simply queries existing geolocation and registration databases. No traffic is sent to the IP address you lookup; the lookup is entirely passive.

What information does this lookup return?

A complete IP lookup returns multiple categories of information pulled from different data sources. Geolocation databases provide location data, while WHOIS registries provide ownership and network details. Here is what each data point means:

Not all data points are available for every IP. Private IP addresses return no geolocation data. Some IP blocks do not have reverse DNS hostnames configured. Datacenter IPs may show a country different from where the server is physically located if the ISP manages it globally.

Common reasons to look up an IP address

IP lookups serve many practical purposes for security, troubleshooting, and investigation:

• Identify the hosting provider for a website by looking up its domain name and seeing which company operates the IP
• Verify whether a server is in the region you expect, helpful for CDN and geolocation-based services
• Check if a visitor to your website is using a VPN, proxy, or datacenter IP instead of a residential connection
• Investigate traffic sources in your web server logs by looking up suspicious IP addresses
• Determine the ISP and organization behind network activity for security and compliance investigations
• Verify the location of an email sender by looking up the mail server's IP address
• Troubleshoot connectivity issues by identifying network operators and ASNs involved in routing
• Check your own public IP address and confirm what location data is visible to websites

Website owners use IP lookups to understand where their traffic originates. Network administrators use them to troubleshoot routing and connectivity problems. Security teams use them to investigate suspicious connections. Affiliate marketers and advertisers use them to verify traffic quality and detect fraud.

Performing security verification

IP lookups provide practical context for security verification and threat investigation. By inspecting the geolocation, ISP, and network details of an IP address, you can assess the legitimacy of traffic, the authenticity of a server, and potential security risks.

Common security verification tasks include checking whether visitor traffic originates from expected geographic regions, identifying connections from datacenters or VPNs that may indicate bots or fraudulent accounts, investigating suspicious IP addresses found in server logs, and verifying that incoming requests come from legitimate service providers. These checks help identify compromised accounts, unauthorized access attempts, and traffic quality issues.

1. 1Identify the suspicious IP address from server logs, access logs, or email headers
2. 2Look up the IP to retrieve its country, city, ISP, and connection type
3. 3Compare the result against your expected traffic sources and geographic policies
4. 4Flag IPs that originate from unexpected regions, datacenters when you expect residential traffic, or known high-risk networks
5. 5Combine the IP data with other signals: account behavior, login patterns, and multi-factor authentication status
6. 6Make access or blocking decisions based on the full context, never IP data alone

IP data is useful context but should never be your only factor in security decisions. A residential IP can belong to a compromised device, and a datacenter IP can be legitimate traffic from a corporate network or employee on a VPN. Geolocation accuracy is limited to city-level, and delays occur before databases reflect moves or ISP changes. Combining IP verification with behavior analysis, device recognition, and authentication controls provides stronger security than any single signal.

How accurate is IP geolocation data?

IP geolocation data is city-level accurate for most residential and mobile IP addresses, typically within 50 miles of the actual location. This accuracy is sufficient for regional services, geo-blocking, and location-based analytics, but it is not precise enough for street-level targeting or real-time location tracking.

Accuracy varies significantly by IP type. Residential ISP IPs generally show the city where the ISP's regional hub operates, which is often the same city as the subscriber. Mobile carrier IPs show the country or region more reliably. Datacenter IPs may show the registrant's headquarters rather than where the server physically sits, resulting in inaccurate location data.

Several factors limit accuracy. IP addresses are assigned in blocks to ISPs, not individual locations. An ISP serving a state might assign IPs from one regional center, so the geolocation database associates all those IPs with that center. Customers can move and keep the same IP, introducing geographic lag. Corporate networks and large organizations often show only their main office location.

VPNs, proxies, and CDNs deliberately obscure the true location. When someone uses a VPN in New York to access a server in Singapore, the IP lookup shows Singapore, not New York. This is why location data alone cannot reliably identify a person's actual physical location. For serious geolocating, the data is a starting point only, not a definitive answer.

Understanding ASN, organization, and reverse DNS

Beyond location and ISP name, an IP lookup reveals deeper network information. The ASN (Autonomous System Number) is a unique identifier that ARIN, APNIC, RIPENCC, and other registries assign to network operators. Large ISPs operate multiple ASNs, each representing a distinct network segment. Google, for example, operates ASN 15169. A reverse DNS lookup attempts to find a hostname associated with an IP by querying PTR (pointer) records in the DNS system.

Reverse DNS is optional—many IP addresses have no hostname configured. When present, it typically reveals information about the network operator. A PTR record for 1.1.1.1 points to one.one.one.one, Cloudflare's public DNS resolver. Mail servers usually have reverse DNS configured because many email systems reject messages from IPs without a matching PTR record, using it as a spam filter.

The organization field comes from WHOIS registries and shows who registered the IP address block with their regional registry. This may be an ISP, a hosting company, a large corporation, or a government entity. The organization name indicates who is responsible for that IP block, which is useful for contacting network operators about abuse or routing issues.

Finding and understanding your own IP address

Your own public IP address is what websites and online services see when you visit them. It is assigned by your Internet Service Provider and is visible to anyone who checks their server logs or runs a trace on your connection. This tool can reveal what location and ISP information is publicly visible about your address.

Your public IP may change periodically, especially on residential connections. ISPs use dynamic IP assignment, rotating addresses among customers to conserve the limited IPv4 address space. Some ISPs cycle IPs daily, others monthly. Restarting your router often triggers an IP change. Business and datacenter IPs are usually static and remain assigned to the same entity indefinitely.

You can see your public IP by using an IP lookup tool, or visiting a service like What is My IP. Your private IP addresses—like 192.168.1.1 on your home router—are only visible within your local network and are never exposed to the internet. A VPN or proxy service masks your real public IP and replaces it with the VPN provider's IP, which is why VPN users show different geolocation data than their true location.

Frequently asked questions