What Is an IP Address?
Every device that connects to the internet receives a unique address – called an IP address (Internet Protocol Address). It works like a postal address for your device, allowing data to find its way to you across the internet.
Without an IP address, websites would not know where to send the content you requested. It is the fundamental building block of internet communication.
IPv4 and IPv6
There are two versions of IP addresses currently in use:
IPv4
The classic format: four numbers separated by dots, each between 0 and 255.
Example: 192.168.1.1 or 8.8.8.8 (Google DNS)
IPv4 allows for approximately 4.3 billion unique addresses – a number that was once thought to be inexhaustible but has since been largely depleted.
IPv6
The modern successor: eight groups of four hexadecimal digits, separated by colons.
Example: 2001:0db8:85a3:0000:0000:8a2e:0370:7334
IPv6 offers an astronomically large number of addresses: 340 undecillion (3.4 × 10³⁸). This ensures the internet can grow for the foreseeable future.
Public vs. Private IP Addresses
Not all IP addresses are the same:
| Type | Description | Example |
|---|---|---|
| Public | Visible on the internet, assigned by your ISP | 85.214.132.117 |
| Private | Used within local networks (home/office) | 192.168.0.1 |
| Loopback | Always refers to your own device | 127.0.0.1 |
Your router has one public IP address that it shares with all devices on your network. Each device internally receives a private IP address.
Static vs. Dynamic IP Addresses
- Dynamic IP: Changes regularly (usually every 24–48 hours or at reconnection). Most home internet connections use this.
- Static IP: Stays the same permanently. Used for servers, businesses, or special subscriptions.
What Can Someone Learn From Your IP Address?
Your IP address reveals more than you might think:
- Approximate location – city and region (not exact address)
- Internet provider (ISP) – e.g., Swisscom, Deutsche Telekom
- Connection type – broadband, mobile, datacenter
- ASN (Autonomous System Number) – the network you belong to
Precise location data like your exact home address cannot be determined from an IP address alone.
How to Protect Your IP Address
If you want to keep your IP address private:
- VPN (Virtual Private Network) – routes your traffic through a server in another country, masking your real IP
- Tor Browser – anonymizes your connection through multiple relay nodes
- Proxy server – acts as an intermediary between you and websites
Check Your IP Address
You can see your current IP address, location and ISP at the top of this page. Use our IP Geolocation Tool to look up any IP address in detail.
Last updated: January 2024