Free IP Address Lookup Online

What an IP address lookup shows

• ISP name: the internet service provider or organization that owns the IP block
• City and region: the approximate geographic area where the IP range is registered
• Country: derived from registry assignment data, accurate above 99%
• ASN (Autonomous System Number): the network identifier for the owning ISP or organization
• Timezone: derived from the registered location of the IP block
• Coordinates: the registered network location, not GPS device position
• Connection type: residential, business, data center, or mobile network

Country-level accuracy is above 99%. City-level accuracy is 50 to 80% depending on the ISP and region. The result reflects where your ISP registers the IP range, not the physical location of your device.

What your IP address lookup reveals

A public IP address lookup returns the information that your ISP registers in the global routing tables. This includes your approximate city or region, country, Internet Service Provider name, Autonomous System Number (ASN), and timezone. Every server you connect to receives this data automatically as part of standard HTTP and TCP communication. There is no way to make an internet connection without exposing your public IP to the servers you contact.

IP geolocation lookup does not use GPS and does not access your device location. The location shown reflects where the IP range is registered in your ISP network infrastructure, not your physical address. Street-level accuracy is not possible from an IP alone. Country-level accuracy is above 99 percent. City-level accuracy ranges from 50 to 80 percent depending on your ISP and region. To protect your IP address location from lookups, use a VPN, which replaces your public IP with the VPN server IP.

Who owns an IP address: owner lookup and WHOIS

This tool shows the ISP or organization registered as the owner of any IP address as part of the lookup result. For a full IP address lookup WHOIS record, regional internet registries (ARIN for North America, RIPE for Europe, APNIC for Asia-Pacific, LACNIC for Latin America, and AFRINIC for Africa) hold the authoritative registration data. WHOIS records include the registrant organization name, registration date, contact information, and abuse reporting details.

IP address owner lookup is used in several practical scenarios: reporting spam or abuse to the responsible ISP, attributing server traffic to a known network during a security investigation, verifying that a third-party API or webhook is originating from the claimed service, and checking whether a connection originates from a known cloud provider range such as AWS, Google Cloud, or Cloudflare. The ASN shown in the lookup result is the key identifier for the owning network.

Reverse IP lookup and DNS lookup

A reverse lookup IP address query finds the hostname associated with an IP, the reverse of the usual DNS lookup that resolves a hostname to an IP. Servers publish reverse DNS (PTR) records to make their IP addressable by name. A mail server at 203.0.113.42 might have a PTR record pointing to mail.example.com. Reverse DNS lookup IP address results are commonly used by mail servers to verify that a sending IP resolves to a legitimate hostname, which is a basic spam filter check.

DNS lookup IP address queries resolve a domain name to its IP address. This is the forward direction: entering a hostname and receiving the IP it points to. Both forward DNS and reverse DNS lookup are standard network debugging tools. For a detailed explanation of PTR records, the in-addr.arpa zone, and when reverse lookup is the right tool to reach for, see the reverse IP address lookup guide.

IP address lookup with location: how it works

This IP geolocation lookup tool sends the IP address to the ip-api.com geolocation API, which returns the city, region, country, ISP, ASN, timezone, and coordinates registered for that IP range. The coordinates are the registered network location, not the device GPS position. The API draws from public routing data, ISP registration records, and commercial geolocation databases that are updated continuously as ISPs reassign IP ranges.

Your own IP is detected automatically by the tool on page load. To look up a different IP, enter it in the input field and submit. IPv4 and IPv6 formats are both supported. The lookup result includes a map marker showing the approximate registered location when coordinates are available. The tool does not store or log any IP addresses you look up. For a full breakdown of how city-level accuracy works and why your IP may show a different city, see the IP address location lookup guide.

How to find an IP address on Windows and other devices

To find your local network IP on Windows, open Command Prompt and run ipconfig. The IPv4 Address shown is your local network IP assigned by your router. This is not your public internet IP. To find your public IP, which is what this tool shows, use this lookup tool or run curl ifconfig.me in a terminal. On Mac and Linux, use ifconfig for local IPs.

To look up a printer IP address on Windows, go to Settings, Devices, select your printer, and open Printer Properties. On Mac, go to System Preferences, Printers and Scanners. Alternatively, most printers have a configuration report you can print directly from the control panel that lists the assigned IP. Printer IPs are local network addresses and will not return geolocation results in this tool since they are not publicly routed. For all network and developer utilities, the Developer Tools section includes additional tools for hashing, encoding, and security tasks.

Common uses for IP address lookup

• VPN verification: after connecting a VPN, check that the shown IP matches the VPN server location rather than your home ISP. If your ISP IP still shows, the VPN tunnel is not active or has leaked.
• Server log investigation: identify the ISP, country, and approximate region behind unfamiliar IPs appearing in your access or error logs.
• Abuse reporting: find the responsible ISP and abuse contact for spam, scraping, or malicious traffic hitting your servers.
• API and webhook verification: confirm that a third-party service's outbound IP belongs to the network range they claim to use, before trusting the request.
• Email header analysis: look up the sending server IP from an email header to verify the originating network and ISP match the claimed sender.
• Geolocation testing: check what city, country, and region your application will see when handling requests from a given IP range.

For developers building applications that handle IP-based access control, rate limiting, or geographic restrictions, understanding what a free IP lookup returns helps calibrate what to store and how to act on it. The IP address lookup guide covers the full range of data an IP lookup can return, including WHOIS, ASN, and geolocation in one place.