What Is a Public IP Address?
An IP address (Internet Protocol address) is a unique numerical label assigned to every device connected to the internet. Think of it as a postal address for your internet connection — it tells websites and services where to send the data you request. Every time you load a webpage, stream a video, or send an email, your IP address is transmitted to the server you're communicating with. Your ISP (Internet Service Provider) assigns you a public IP address every time you connect to the internet.
There is an important distinction between your public IP and your private IP. Your public IP address is the one visible to the outside world — every website, service, and server you connect to can see it. It is assigned by your ISP and represents your entire household or office network to the internet. Your private IP address, on the other hand, is assigned by your router and is only visible within your local network. Devices on your home network (phones, laptops, smart TVs) each have unique private IPs like 192.168.1.x, but they all share the same public IP when communicating with the internet.
IP addresses come in two formats: IPv4 and IPv6. IPv4 is the older and more familiar format, written as four groups of numbers separated by dots (e.g., 203.0.113.42). IPv4 provides approximately 4.3 billion unique addresses, a pool that has been effectively exhausted due to the massive growth of internet-connected devices. IPv6 is the newer format, written as eight groups of hexadecimal numbers (e.g., 2001:0db8:85a3::8a2e:0370:7334), providing a virtually unlimited address space. Many ISPs now assign both IPv4 and IPv6 addresses simultaneously in a "dual-stack" configuration.
Your IP address reveals more about you than most people realise. It exposes your approximate geographic location — typically accurate to the city or regional level — your ISP's name, and the type of connection you're using (residential, business, or mobile). IP geolocation databases are used by websites for targeted advertising, content geo-blocking (showing different content based on your country), and regional pricing. Your IP also reveals whether you're using a VPN or proxy service, which is why some websites block VPN traffic.
Your public IP address can change over time. Most residential ISPs assign dynamic IP addresses, meaning your IP may change when you restart your router, when your ISP's DHCP lease expires, or when you reconnect after an outage. Some ISPs assign static IP addresses that remain the same indefinitely — these are more common for business connections and can be more easily tracked across sessions. If privacy is a concern, a dynamic IP offers slightly more protection than a static one, but neither provides meaningful privacy without a VPN.
What Can Someone Do With Your IP Address?
The most immediate use of your IP address is approximate geolocation. Every website you visit can determine your city, region, and country from your IP address alone using freely available geolocation databases. This information is used for targeted advertising (showing you ads relevant to your location), content geo-blocking (restricting access to streaming content based on your country), and regional pricing (charging different prices based on where you appear to be browsing from). It is important to understand that IP geolocation is accurate to the city level — it does not reveal your street address or building number.
Your ISP and connection type are publicly associated with your IP address. Any website you visit can identify which internet provider you use, whether your connection is residential or commercial, and whether your IP belongs to a known VPN or data centre range. Some services treat connections from certain ISPs differently — for example, streaming services may throttle traffic from ISPs known for high bandwidth usage, and e-commerce sites may flag orders from data centre IPs as potentially fraudulent.
Your IP address enables online activity correlation across websites and sessions. Your ISP has a complete record of every website you visit, timestamped and linked to your account. Advertising networks track your IP across thousands of websites to build a detailed profile of your interests, browsing habits, and purchasing behaviour. Without a VPN, this tracking happens automatically and continuously — you do not need to accept cookies or create accounts for IP-based tracking to work. Your IP is transmitted with every single connection your device makes.
Websites and services can block, throttle, or restrict access based on your IP address. This is the mechanism behind geographic content restrictions — streaming services check your IP's country and block access to content not licensed in your region. Governments use IP blocking to censor websites. Online services use IP-based rate limiting to prevent abuse. If your IP has been flagged for suspicious activity (even by a previous user of the same dynamic IP), you may experience CAPTCHAs, access restrictions, or outright blocks on certain websites.
How to Hide Your IP Address
The most practical way to hide your IP address is to use a VPN (Virtual Private Network). When you connect to a VPN, all your internet traffic is routed through an encrypted tunnel to a VPN server in a location you choose. Websites and services see the VPN server's IP address instead of your real one, effectively making you appear to be browsing from a different city or country. A good VPN also encrypts your traffic, preventing your ISP from seeing which websites you visit. For most users, a VPN provides the best balance of privacy, speed, and ease of use.
The Tor network provides stronger anonymity by routing your traffic through three or more volunteer-operated relays around the world, with each relay only knowing the previous and next hop — not the full path. This makes it extremely difficult for any single party to trace your traffic back to your real IP. However, Tor is significantly slower than a VPN due to the multiple relay hops, and many websites block Tor exit nodes. Tor is best suited for high-risk privacy situations such as whistleblowing or journalism in restrictive countries, rather than everyday browsing.
Proxy servers act as intermediaries between your device and the internet, forwarding your requests through a different IP address. However, most proxies do not encrypt your traffic — your ISP can still see what you're doing, and the proxy operator can see all your unencrypted traffic. HTTPS proxies provide encryption for web browsing, but they do not protect other types of traffic (email clients, apps, etc.). Proxies are useful for simple IP masking but should not be relied upon for privacy or security.
For most users, a reputable VPN is the recommended solution. It provides strong encryption, hides your IP from websites and your ISP, and works across all applications on your device — not just your browser. NordVPN is independently audited, operates servers in 60+ countries, and includes built-in DNS, IP, and WebRTC leak protection to ensure your real identity stays hidden. A VPN is the single most effective tool for everyday IP privacy.
If the tool shows 'VPN or Proxy Detected', it means your current IP address is associated with a known VPN provider, proxy service, or data centre hosting company in IP reputation databases. This is a good sign if you are intentionally using a VPN — it confirms your real IP is hidden. If you are not using a VPN and this status appears, it could mean your ISP uses carrier-grade NAT or that your IP was previously assigned to a hosting provider. Some corporate networks also trigger VPN detection.
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