What is my IP address?

What is an IP address?

An IP address (Internet Protocol address) is a unique numerical label assigned to every device that connects to the internet. It works as a digital address that lets devices find and communicate with each other. Without IP addresses, the internet simply wouldn't work.

Two versions of IP addresses are in use today:

• IPv4: the most widely used format, made up of four groups of numbers separated by dots (e.g. 192.168.1.1). IPv4 offers just over 4.3 billion unique addresses, but with the growth of the internet they are running out.
• IPv6: the successor to IPv4, with a much longer notation made up of eight groups of hexadecimal characters (e.g. 2001:0db8:85a3::8a2e:0370:7334). IPv6 offers a virtually unlimited number of addresses and is being deployed more and more widely.

Your IP address is assigned by your internet service provider (ISP). When you visit a website, your browser sends your IP address along so the web server knows where to send its response. This happens completely automatically and is the basis of all internet communication.

Public vs. private IP address

There is an important difference between your public and private IP address:

• Public IP address: this is the address websites and services see when you connect to the internet. It is assigned by your internet provider and is visible to the outside world. The address our tool shows above is your public IP.
• Private IP address: this is the address your router assigns to devices on your home network (e.g. 192.168.1.x or 10.0.0.x). This address is only visible within your own network and is not passed on to the internet.

Your router translates private addresses into your public address using NAT (Network Address Translation). This lets several devices in your home share the same public IP address.

Dynamic vs. static IP address

Your internet provider can assign you a dynamic or a static IP address:

• Dynamic IP: changes periodically and is assigned automatically via DHCP. Most home connections use dynamic IP addresses. You may get a new address after restarting your modem.
• Static IP: always stays the same. This is essential for hosting servers, mail servers, VPN connections and other services that need to be reachable at a fixed address.

With Theory7 VPS hosting your server comes with a static Dutch IPv4 address by default. This is important for reliable hosting, email delivery and professional use.

How do you protect your IP address?

Your IP address reveals information about your location and internet provider. If you want to hide it, you have several options:

• VPN (Virtual Private Network): the most popular method. A VPN encrypts your internet traffic and routes it through a server in another location. Websites see the IP address of the VPN server instead of yours.
• Proxy server: acts as an intermediary between you and the internet. Your traffic is forwarded through the proxy, so your real IP stays hidden. Less secure than a VPN, because the traffic isn't always encrypted.
• Tor browser: routes your traffic through multiple encrypted nodes around the world. Very private, but slower than a VPN because of the multiple hops.

Why does your IP address matter?

Your IP address plays a crucial role in several scenarios:

• Web hosting: every website needs an IP address to be reachable. A static IP ensures a stable DNS configuration and better reachability.
• Email deliverability: a dedicated IP address for your mail server prevents your emails from being flagged as spam because of what other users on the same IP do.
• Security: IP-based access control (whitelisting) protects servers and admin interfaces. With Theory7 SSL certificates all communication is encrypted, regardless of the IP address.
• Geo-restrictions: some services limit access based on the location of your IP. A Dutch IP gives you access to Dutch streaming services and prevents geo-blocking.
• Troubleshooting: when you have network problems, your IP address is essential for diagnosis. DNS problems, routing issues and connection errors are often tracked down using IP information.

What can someone do with your IP address?

An IP address on its own is not a major privacy risk, but it does reveal some limited information:

• Approximate location: city or region (not your exact address)
• Internet provider: which company provides your internet access
• Network type: whether you have a business or a home connection

What someone cannot do with just your IP address:

• Find your exact home address (only your ISP can do that, with a court order)
• Establish your identity
• Gain access to your devices (unless you have unpatched vulnerabilities)

Even so, it's wise to be careful about sharing your IP address on public forums. Use a VPN if you want extra privacy while browsing.

IP addresses for web hosting and servers

When you host a website or run a server, a static IP address is virtually indispensable:

• DNS A records point your domain name to a specific IP address
• SSL/TLS certificates are validated based on your domain and server IP
• Reverse DNS (PTR record) links your IP back to your domain name, which is essential for a trustworthy mail server
• IP reputation affects the deliverability of emails sent from your server

With a Theory7 VPS you always get a dedicated Dutch IPv4 address, full root access and a reliable connection from the Evoswitch data center in the Netherlands.