What Is Your IP Address and What Does It Reveal About You?
Your IP address is more revealing than most people realize. Learn what it exposes about your location and ISP, how websites use it to track you, and how a VPN masks it.
What Is an IP Address?
An IP (Internet Protocol) address is a numerical label assigned to every device connected to the internet. It serves two purposes: identifying your device and providing a return address so data can find its way back to you. Without an IP address, two-way communication on the internet would be impossible -- websites would have nowhere to send the page you requested.
IPv4 vs IPv6
IPv4 addresses look like four numbers separated by dots, such as 192.168.1.1. The IPv4 system can support about 4.3 billion unique addresses -- a number that seemed enormous in the 1980s but has been exhausted by the global growth of the internet. IPv6 was developed as the successor, using a longer format (like 2001:0db8:85a3::8a2e:0370:7334) that supports a practically unlimited number of addresses. Most modern devices are assigned both an IPv4 and an IPv6 address, and many VPNs need to handle both to prevent leaks.
What Your IP Address Reveals
Your IP address does not reveal your name or exact home address, but it exposes more than most people expect. Any website you visit can immediately see your approximate city or region, your Internet Service Provider, and in some cases your organization or institution. This information is enough for advertisers to target you geographically, for streaming platforms to enforce geo-restrictions, and for authorities to request your identity from your ISP.
- Your approximate physical location (city or region)
- Your Internet Service Provider (ISP)
- Your organization, university, or company (for business/academic IPs)
- Which country you are in -- used for geo-blocking
- A persistent identifier that can link your visits across different websites
How Websites Use Your IP to Track You
Advertisers and analytics platforms have long used IP addresses as a cross-site tracking identifier. Even if you clear cookies, your IP address persists. An advertising network can see that IP 203.0.113.45 visited a sports site, then a travel site, then an electronics shop -- and build a behavioral profile without you ever clicking 'accept' on a cookie banner. This type of tracking is harder to opt out of than cookie-based tracking.
Dynamic vs Static IP Addresses
Most home internet connections use dynamic IP addresses -- your ISP assigns you a new IP each time you reconnect or periodically reassigns it. This provides minimal privacy protection, because ISPs log which customer held which IP at which time, and that data can be subpoenaed. Business connections typically use static IPs that never change, making them even easier to identify.
How a VPN Masks Your IP Address
When you connect to Nexun, your real IP address is replaced by the IP address of the Nexun server you connect to. Websites, trackers, and streaming platforms see only the server's IP -- they have no way to determine your actual location or who you are. You can check this for yourself using Nexun's IP checker tool at nexun.io/ip -- it shows exactly what the outside world sees when you browse with and without the VPN active.
IPv6 Leaks -- a Hidden Risk
Many VPNs protect your IPv4 address but forget about IPv6. If your device has an IPv6 address and the VPN only tunnels IPv4 traffic, websites can still see your real IPv6 address -- a leak that would completely undermine your privacy. Nexun handles both protocols, ensuring your real IP never slips through regardless of which version your ISP provides.
FAQ
Can a website see my exact home address from my IP?
No. Websites can determine your approximate city or region and your ISP, but not your precise street address. Only your ISP knows the exact mapping between your IP and your identity. However, ISPs can be compelled to reveal this information to authorities with a valid legal order.
Does my IP address change?
Most home connections use dynamic IP addresses that can change when you restart your router or periodically as assigned by your ISP. However, your ISP logs which IP you had at every moment, so changing IPs does not provide meaningful privacy. A VPN gives you a consistent, masked IP from the VPN provider's pool.
What is an IPv6 leak and why does it matter?
An IPv6 leak occurs when a VPN only tunnels IPv4 traffic but your device also has an IPv6 address. Websites that support IPv6 will see your real IPv6 address, completely bypassing the VPN's privacy protection. Nexun prevents this by tunneling both IPv4 and IPv6 traffic through the encrypted connection.