What is an IP Address Lookup?
The IP Address Lookup tool is a free online utility that instantly identifies your public IP address, geolocation (country/region/city), and ISP (Internet Service Provider) information. It auto-detects upon page load — no input required.
It also supports custom IP/domain lookups, IPv6 detection, VPN/proxy detection, and reverse DNS lookups for advanced network diagnostics. Your approximate location is displayed visually on a map for quick reference.
Key Features
Auto IP Detection & Copy
Automatically detects your public IP address when you visit the page and lets you copy it to your clipboard with one click.
Geolocation & Map Display
Identifies your country, region, city, and coordinates based on IP and displays your approximate location visually on a map.
VPN/Proxy & IPv6 Detection
Automatically detects VPN or proxy usage and also checks for IPv6 address availability alongside your IPv4 address.
Custom IP/Domain Lookup
Look up any IP address or domain name to retrieve its geolocation, ISP, and network information beyond just your own IP.
How to Use
- Visit the Page — Your public IP address and location information are automatically detected when you load the page.
- Check IP Address — Your current public IP address is displayed prominently at the top. Click the copy button to copy it.
- View Location & Network Info — Check your approximate location (country, region, city) along with ISP and VPN detection results.
- Custom IP/Domain Lookup — Enter a different IP address or domain to look up its information separately.
Use Cases
Security Check
Verify your current IP to ensure you're not connecting from an unintended location or network.
VPN Verification
Confirm that your VPN is working correctly by checking whether your IP address and location have actually changed after connecting.
Network Diagnostics
Check ISP information, AS numbers, and reverse DNS to help diagnose network issues and connectivity problems.
Server & Remote Management
Quickly identify your current IP address to add it to server firewall allowlists or remote access configurations.
IP Address Reference Tables
These tables summarize the difference between public and private IP addresses and what an IP address can actually reveal. Use them as a guide to understand the IP shown by the tool above. If you are worried about IP exposure, you can also check what is and is not possible.
Public IP vs Private IP Comparison
| Category | Public IP | Private IP |
|---|---|---|
| Assigned by | Your internet provider (ISP) | Your router, to devices inside the network |
| Address ranges | Everything outside the private ranges | 192.168.x.x, 10.x.x.x, 172.16-31.x.x |
| Internet visibility | Identifiable from outside | Used only inside the local network |
| Global uniqueness | Unique worldwide | Can repeat across different networks |
| Where to check | Shown automatically on this page | Device network settings |
| Typical uses | Server allowlists, remote access, firewall rules | Router port forwarding, printer and NAS setup |
| Can it change | May change on reconnect (dynamic IP) | Can be fixed in router settings |
The address shown at the top of this tool is your public IP. Every device behind the same router shares one public IP.
What an IP Address Can and Cannot Reveal
| Item | Possible? | Details |
|---|---|---|
| Approximate region (city or province level) | Yes | Estimated from ISP registration data, so a nearby or wrong city may appear |
| Carrier and ISP | Yes | Providers such as KT, SK Broadband, LG U+ plus the AS number |
| Connection type | Yes | Whether it is mobile (LTE, 5G) or Wi-Fi and wired |
| VPN or proxy use | Partly | Known VPN ranges are detected, but not with 100% accuracy |
| Exact home address | No | An IP alone cannot pinpoint a street address or building |
| Identity such as name or phone number | No | Only the ISP holds subscriber data, and it usually requires a legal process |
| Search history and visited sites | No | An IP itself carries no browsing history |
| Device type and browser | No | That comes from the User-Agent your browser sends, not from the IP |
An IP address alone cannot identify a person. This tool also shows only the items marked as possible above.
Frequently Asked Questions
What is my IP address?
An IP address (Internet Protocol Address) is a unique numerical address assigned to every device connected to the internet. It enables data to be sent and received across the network.
Is the location shown accurate?
IP-based geolocation can determine your approximate location (city level). It may differ from your exact street address or GPS coordinates, and may show your ISP's server location instead.
Does using a VPN change my IP?
Yes, when using a VPN, the VPN server's IP address is displayed instead of your real one. This hides your actual IP and location.
What is the difference between IPv4 and IPv6?
IPv4 uses 32-bit addresses (e.g., 192.168.0.1) providing about 4.3 billion addresses. IPv6 uses 128-bit addresses (e.g., 2001:0db8::1) providing virtually unlimited addresses.
Can I check my IP address on a smartphone?
Yes! Just open this page in your mobile browser. On Wi-Fi, your router's public IP is displayed. On LTE/5G, the public IP assigned by your carrier is shown.
What is the difference between a public IP and a private IP?
A public IP is your internet-facing address assigned by your ISP, visible globally — this is what this tool shows. A private IP (e.g., 192.168.x.x) is used only within your local network and is not visible on the internet.
Privacy Notice
While external APIs (ip-api.com, ipify.org) are called to look up IP information, the results are only displayed in your browser and are not stored on any server. All lookup data disappears when you close the page.